[Effect of lifestyle interventions on reduction of cardiovascular disease events and its mortality in pre-diabetic patients:long-term follow-up of Da Qing Diabetes Prevention Study]. Impact of intensive lifestyle and metformin therapy on cardiovascular disease risk factors in the diabetes prevention program. Postchallenge Glucose, A1C, and Fasting Glucose as Predictors of Type 2 Diabetes and Cardiovascular Disease Development and piloting of a community health worker-based intervention for the prevention of diabetes among New Zealand Maori in Te Wai o Rona: Diabetes Prevention Strategy. Ten-Year Mortality and Cardiovascular Morbidity in the Finnish Diabetes Prevention Study—Secondary Analysis of the Randomized Trial General effect on high-risk persons when general practitioners are trained in intensive treatment of type 2 diabetes Effect of Intervention in Subjects with High Risk of Diabetes Mellitus in Pakistan Early lifestyle intervention in patients with non-insulin-dependent diabetes mellitus and impaired glucose tolerance. Lowering the criterion for impaired fasting glucose: impact on disease prevalence and associated risk of diabetes and ischemic heart disease. The prevention or delay of type 2 diabetes. Physical Activity/Exercise and Type 2 Diabetes Effects of Ramipril and Rosiglitazone on Cardiovascular and Renal Outcomes in People With Impaired Glucose Tolerance or Impaired Fasting Glucose Prevention of type 2 diabetes in adults with impaired glucose tolerance: the European Diabetes Prevention RCT in Newcastle upon Tyne, UK No excess 12-year mortality in men with impaired glucose tolerance who participated in the Malmö Preventive Trial with diet and exercise Long-term effects of a randomised trial of a 6-year lifestyle intervention in impaired glucose tolerance on diabetes-related microvascular complications: the China Da Qing Diabetes Prevention Outcome Study Prevention of type 2 diabetes by lifestyle intervention: a Japanese trial in IGT males. Effects of insulin resistance and insulin secretion on the efficacy of interventions to retard development of type 2 diabetes mellitus: the DA Qing IGT and Diabetes Study. The long-term effect of lifestyle interventions to prevent diabetes in the China Da Qing Diabetes Prevention Study: a 20-year follow-up study Lifestyle Intervention and Adipokine Levels in Subjects at High Risk for Type 2 Diabetes Chinese herbal medicine Tianqi reduces progression from impaired glucose tolerance to diabetes: a double-blind, randomized, placebo-controlled, multicenter trial. Screening for diabetes using an oral glucose tolerance test within a western multi-ethnic population identifies modifiable cardiovascular risk: the ADDITION-Leicester study Study on lifestyle-intervention and impaired glucose tolerance Maastricht (SLIM): design and screening results. Effect of baseline HbA1c level on the development of diabetes by lifestyle intervention in primary healthcare settings: insights from subanalysis of the Japan Diabetes Prevention Program
OBJECTIVE To investigate if a six-year intensive lifestyle intervention in people with pre-diabetes lead to reduction of cardiovascular events and cardiovascular disease ( CVD ) mortality in subsequent 23 years . METHODS Five hundreds and nineteen subjects with normal glucose tolerance ( NGT ) and 577 subjects with impaired glucose tolerance ( IGT ) in Da Qing city were recruited in the study in 1986 . The IGT subjects r and omly assigned to either the no-intervention group or one of three lifestyle intervention groups ( diet , exercise , or diet plus exercise ) to receive a 6-year lifestyle intervention . In 2009 , the participants were followed up to assess the primary outcomes of cardiovascular events and CVD mortality by a question naire and medical records . RESULTS Subjects in IGT no-intervention group had the highest incidences of cardiovascular events ( 44.44 % ) and CVD mortality ( 20.00 % ) , while those in NGT group had the lowest incidences of cardiovascular events ( 29.59 % ) and CVD mortality ( 7.52 % ) after 23-year follow-up . The incidences of cardiovascular events and CVD mortality in IGT intervention subjects were 37.84 % and 12.53 % , respectively . The multivariable analyses showed that , after controlling of age , gender , BMI smoking , blood pressure and cardiovascular event at baseline , the CVD mortality and incidence of cardiovascular events in IGT no-intervention group was 1.89 ( HR = 1.89 , 95%CI 1.11 - 3.22 , P = 0.02 ) and 1.38 ( HR = 1.38 , 95%CI 1.01 - 1.90 , P = 0.04 ) times of those in NGT group . However , the CVD mortality and incidence of cardiovascular events were not different in the IGT intervention group compared with those in the NGT group ( HR = 1.39 , 95%CI 0.89 - 2.18 , P = 0.15 and HR = 1.25 , 95%CI 0.98 - 1.59 , P = 0.07 , respectively ) . CONCLUSIONS Subjects with IGT were at high risk for cardiovascular events and mortality . A six-year lifestyle intervention in this population can reduce both the incidence of cardiovascular event and CVD mortality OBJECTIVE The Diabetes Prevention Program demonstrated the ability to delay or prevent type 2 diabetes in participants with impaired glucose tolerance ( IGT ) . Participants with IGT are at high risk for cardiovascular disease ( CVD ) , with a marked increase in the number and severity of CVD risk factors . We prospect ively assessed the impact of our interventions on hypertension , dyslipidemia , and CVD events . RESEARCH DESIGN AND METHODS The study group consisted of 3,234 individuals with IGT r and omly assigned to receive intensive lifestyle intervention , metformin , or placebo . Annual assessment of blood pressure , lipids , electrocardiogram , and CVD events was undertaken . RESULTS Hypertension was present in 30 % of participants at study entry and then increased in the placebo and metformin groups , although it significantly decreased with intensive lifestyle intervention . Triglyceride levels fell in all treatment groups , but fell significantly more with intensive lifestyle intervention . Total cholesterol and LDL cholesterol levels were similar among treatment groups . Intensive lifestyle intervention significantly increased the HDL cholesterol level and reduced the cumulative incidence of the proatherogenic LDL phenotype B. At 3 years of follow-up , the use for pharmacologic therapy to achieve established goals in the intensive lifestyle group was 27 - 28 % less for hypertension and 25 % less for hyperlipidemia compared with placebo and metformin groups . Over an average of 3 years , 89 CVD events from 64 participants were positively adjudicated study wide , with no differences among treatment groups . CONCLUSIONS Lifestyle intervention improves CVD risk factor status compared with placebo and metformin therapy . Although no differences in CVD events were noted after 3 years , achieved risk factor modifications suggest that longer intervention may reduce CVD event rates OBJECTIVE A1C has been proposed as a new indicator for high risk of type 2 diabetes . The long-term predictive power and comparability of elevated A1C with the currently used high-risk indicators remain unclear . We assessed A1C , impaired glucose tolerance ( IGT )  , and  impaired fasting glucose ( IFG )  as predictors of type 2 diabetes and cardiovascular disease ( CVD ) at 10 years . RESEARCH DESIGN AND METHODS This prospect i ve population -based study of 593 inhabitants from northern Finl and , born in 1935 , was conducted between 1996 and 2008 .  An oral glucose tolerance test ( OGTT ) was conducted at baseline and follow-up , and A1C was determined at baseline .  Those with a history of diabetes were excluded from the study . Elevated A1C was defined as 5.7–6.4 % . Incident type 2 diabetes was confirmed by two OGTTs . Cardiovascular outcome was measured as incident CVD or CVD mortality . Multivariate log-binomial regression models were used to predict diabetes , CVD , and CVD mortality at 10 years . Receiver operating characteristic curves compared predictive values of A1C , IGT , and IFG . RESULTS Incidence of diabetes during the follow-up was 17.1 % . Two of three of the cases of newly diagnosed diabetes were predicted by a raise in ≥1 of the markers . Elevated A1C , IGT , or IFG preceded diabetes in 32.8 , 40.6 , and 21.9 % , respectively . CVD was predicted by an intermediate and diabetic range of 2-h glucose but only by diabetic A1C levels in women . CONCLUSIONS A1C predicted 10-year risk of type 2 diabetes at a range of A1C 5.7–6.4 % but CVD only in women at A1C ≥6.5 % OBJECTIVE The progression from impaired glucose tolerance (IGT)/impaired fasting glucose ( IFG ) to type 2 diabetes can be prevented or delayed through intensive lifestyle changes . How to translate this to implementation across whole communities remains unclear . We now describe the results to a pilot of a personal trainer ( Maori Community Health Worker , MCHW ) approach among Maori in New Zeal and . DESIGN , SETTING AND SUBJECTS A r and omised cluster-controlled trial of intensive lifestyle change was commenced among 5,240 non-pregnant Maori family members without diabetes from 106 rural and 106 urban geographical clusters . Baseline assessment s included lifestyle question naires , anthropometric measurements and venesection . A pilot study ( Vanguard Study ) cohort of 160 participants were weighed before and during MCHW intervention , and compared with fifty-two participants weighed immediately before intervention and with 1,143 participants from the same geographical area . Interactions between participants and the MCHW were reported using personal digital assistants with a programmed detailed structured approach to each interview . RESULTS During the Vanguard Study , participants and MCHW found the messages , toolkit and delivery approach acceptable . Those with IGT/IFG diagnosed ( n 27 ) experienced significant weight loss after screening and during the Vanguard Study ( 5.2 ( sd 6.6 ) kg , paired t test P < 0.01 ) . Significant weight loss occurred during the Vanguard Study among all participants ( -1.3 ( sd 3.6 ) kg , P < 0.001 ) . CONCLUSIONS Comparable initial weight loss was shown among those with IGT/IFG and those from existing trials . Community-wide prevention programmes are feasible among Maori and are likely to result in significant reductions in the incidence of diabetes Background The Finnish Diabetes Prevention Study ( DPS ) was a r and omized controlled trial , which showed that it is possible to prevent type 2 diabetes by lifestyle changes . The aim of the present study was to examine whether the lifestyle intervention had an effect on the ten-year mortality and cardiovascular morbidity in the DPS participants originally r and omized either into an intervention or control group . Furthermore , we compared these results with a population -based cohort comprising individuals of varying glucose tolerance states . Methods and Findings Middle-aged , overweight people with IGT ( n = 522 ) were r and omized into intensive intervention ( including physical activity , weight reduction and dietary counseling ) , or control “ mini-intervention ” group . Median length of the intervention period was 4 years and the mean follow-up was 10.6 years . The population -based reference study cohort included 1881 individuals ( 1570 with normal glucose tolerance , 183 with IGT , 59 with screen-detected type 2 diabetes , 69 with previously known type 2 diabetes ) with the mean follow-up of 13.8 years .  Mortality and cardiovascular morbidity data were collected from the national Hospital Discharge Register and Causes of Death Register . Among the DPS participants who consented for register linkage ( n = 505 ) , total mortality ( 2.2 vs. 3.8 per 1000 person years , hazard ratio HR = 0.57 , 95 % CI 0.21–1.58 ) and cardiovascular morbidity ( 22.9 vs. 22.0 per 1000 person years , HR = 1.04 , 95 % CI 0.72–1.51 ) did not differ significantly between the intervention and control groups . Compared with the population -based cohort with impaired glucose tolerance , adjusted HRs were 0.21 ( 95 % CI 0.09–0.52 ) and 0.39 ( 95 % CI 0.20–0.79 ) for total mortality , and 0.89 ( 95 % CI 0.62–1.27 ) and 0.87 ( 0.60–1.27 ) for cardiovascular morbidity in the intervention and control groups of the DPS , respectively . The risk of death in DPS combined cohort was markedly lower than in FINRISK IGT cohort ( adjusted HR 0.30 , 95 % CI 0.17–0.54 ) , but there was no significant difference in the risk of CVD ( adjusted HR 0.88 , 95 % CI 0.64–1.21 ) . Conclusions Lifestyle intervention among persons with IGT did not decrease cardiovascular morbidity  during the first 10 years of follow-up . However , the statistical power may not be sufficient to detect small differences between the intervention and control groups . Low total mortality among participants of the DPS compared with individuals with IGT in the general population could be ascribed to a lower cardiovascular risk profile at baseline and regular follow-up . Trial Registration Clinical Trials.gov Objective . Within the frame of a r and omized clinical trial to examine whether training of general practitioners ( the intervention group ) in intensive lifestyle modification and pharmacological treatment of patients with type 2 diabetes has a spillover effect on individuals with impaired fasting glycaemia ( IFG ) or impaired glucose tolerance ( IGT ) . Design . A high-risk screening study for type 2 diabetes with an intervention programme , where general practice s were r and omized to provide st and ard treatment versus intensive lifestyle modification and pharmacological treatment to newly diagnosed diabetic patients . Setting . General practice s in Denmark . Subjects . Of 1821 individuals identified with IFG or IGT , results from oral glucose tolerance tests after one and three years were available in 1510 individuals . Main outcome measures . Progression rates from IFG and IGT to diabetes and effect of intervention were estimated in a regression model using interval censoring . Results . A total of 442 persons developed diabetes .  There was no significant overall effect of intervention on progression rates . For risk factors , no difference in rate of change was found between r and omization groups , but a difference was found between general practice s within the same r and omization groups . Conclusion . General practitioners identify a high number of incident diabetes cases in individuals with IFG or IGT found by high-risk screening . Intervention at the general practitioner 's level in intensive treatment type 2 diabetes does not have a significant spillover effect reducing the risk of diabetes from pre-diabetic conditions . This could indicate that intervention strategies should be specifically targeted at individuals with IFG or IGT , either by training general practitioners or directly at the individual level Aims . To observe the rate of conversion from impaired glucose tolerance ( IGT ) to diabetes following lifestyle modification ( LSM ) or a combination of lifestyle and metformin compared to a control population with 18-month followup . Methods . Forty screening camps were organized , which 5000 people attended . Around 2300 persons filled the question naire and 1825 subjects were identified as high risk . Of 1739 subjects who took the oral glucose tolerance test , 317 subjects were identified as IGT . The 317 IGT subjects were r and omized into three groups : control group was given st and ard medical advice , LSM group was given intensive lifestyle modification advice , while LSM + drug group was given intensive lifestyle advice and metformin 500 mg twice daily . Results . At the end , 273 subjects completed the study , giving a compliance rate of 86 % . Total of 47 incident cases of diabetes were diagnosed ( overall incidence was 4 cases per 1000 person-months with the incidence of 8.6 cases in control group , 2.5 cases in the LSM , and 2.3 cases in the LSM + drug groups ) . Conclusions . Study showed that lifestyle intervention had a major impact in preventing diabetes among IGT subjects in this region . Adding drug did not show any improved results . We recommend lifestyle advice and followup should be incorporated in primary health care Non-insulin-dependent diabetes mellitus ( NIDDM ) is preceded by impaired glucose tolerance ( IGT ) lasting for years before manifesting as overt hyperglycaemia . Both genetic and environmental factors contribute to the development of IGT and NIDDM . Obesity , physical inactivity and high-fat diet have been found to predict IGT and NIDDM . Therefore , a diet and exercise intervention from diagnosis of NIDDM could improve the treatment outcome and prognosis of patients with NIDDM . Furthermore , because subjects with IGT are at increased risk for diabetes and atherosclerotic vascular disease , it is reasonable to assume that in terms of reducing the incidence and longterm consequences of NIDDM an intervention at this phase is more effective than in overt diabetes . Although the nonpharmacological approach is generally accepted as the first-line treatment of NIDDM its efficacy has often been question ed . Therefore , it is important to carry out long-term controlled studies to find out to what extent lifestyle modification could improve the metabolic control and level of major cardiovascular risk factors known to be associated with poor outcome in NIDDM . This kind of study also gave relevant experience in planning studies aim ing at primary prevention of NIDDM . One-year dietary and exercise intervention on newly diagnosed NIDDM patients in Kuopio , Finl and result ed in a better metabolic control and a moderate reduction in cardiovascular risk factors as compared to the conventional treatment group . After the second year of follow-up only 12.5 % in the intervention group were receiving  oral antidiabetic drugs  vs. 34.8 % in the conventional treatment group . Weight reduction and a reduced use of saturated fats appeared to be the main determinants of successful treatment results . Good aerobic capacity was associated with an increase in HDL cholesterol . A multicentre primary prevention study on IGT patients is continuing in Finl and applying the same principles of intervention as used in the study on newly diagnosed NIDDM patients . Pilot results show that glucose tolerance can be improved by lifestyle changes OBJECTIVE To determine the effect of lowering the fasting plasma glucose ( FPG ) criterion for impaired fasting glucose ( IFG ) on the prevalence of IFG , the risks of diabetes , and cardiovascular disease ( CVD ) associated with IFG . RESEARCH DESIGN AND METHODS Three studies were used : 1 ) . the 1998 National Health Survey ( NHS98 ) , a r and omly selected cross-sectional sample of 4723 subjects ; 2 ) . the Singapore Impaired Glucose Tolerance ( IGT ) Follow-up Study , a cohort study comprising 295 IGT and 292 normal glucose tolerance subjects ( frequency matched for age , sex , and ethnic group ) followed up from 1992 to 2000 ; and 3 ) . the Singapore CVD Cohort Study , comprising 5920 subjects from three cross-sectional studies in whom the first ischemic heart disease ( IHD ) event was identified through linkage to registry data bases . Risk of diabetes ( Singapore IGT Follow-up study ) was estimated using logistic regression adjusted for age , sex , and ethnicity . Risk of IHD ( Singapore CVD cohort ) was estimated using stratified ( by study , from which data were derived ) Cox 's proportional hazards models adjusted for age , sex , and ethnicity . RESULTS Lowering the criterion for diagnosing IFG to 5.6 mmol/l increased the prevalence of IFG from 9.5 to 32.3 % in the NHS98 . The lower cutoff identified more subjects at risk of diabetes and IHD , but the relative risk was lower than that for IGT . CONCLUSIONS Greater efforts to identify those with IGT , or a group at similar risk of diabetes and CVD , may be a more efficient public health measure than lowering the FPG criterion for diagnosing IFG D iabetes is one of the most costly and burdensome chronic diseases of our time and is a condition that is increasing in epidemic proportions in the U.S. and throughout the world ( 1 ) . The complications result ing from the disease are a significant cause of morbidity and mortality and are associated with the damage or failure of various organs such as the eyes , kidneys , and nerves . Individuals with type 2 diabetes are also at a significantly higher risk for coronary heart disease , peripheral vascular disease , and stroke , and they have a greater likelihood of having hypertension , dyslipidemia , and obesity ( 2–6 ) . There is also growing evidence that at glucose levels above normal but below the diabetes threshold diagnostic now referred to as pre-diabetes , there is a substantially increased risk of cardiovascular disease ( CVD ) and death ( 5,7–10 ) . In these individuals , CVD risk factors are also more prevalent ( 5–7,9,11–14 ) , which further increases the risk but is not sufficient to totally explain it . In contrast to the clear benefit of glucose lowering to prevent or retard the progression of microvascular complications associated with diabetes ( 15– 18,21 ) , it is less clear whether the high rate of CVD in people with impaired glucose homeostasis , i.e. , those with impaired fasting glucose ( IFG ) , impaired glucose tolerance ( IGT ) , or diabetes , is caused by elevated blood glucose levels or will respond to treatments that lower blood glucose . Epidemiological studies have shown a clear relationship ( 19,20 ) , whereas intervention trials in people with diabetes suggest , but have not demonstrated , a clear benefit of glycemic control ( 15,16,21,22 ) . Additionally , there are no studies that have investigated a benefit of glucose lowering on macrovascular disease in subjects with only pre-diabetes ( IFG or IGT ) but not diabetes . Although the treatment of diabetes has become increasingly sophisticated , with over a dozen pharmacological agents available to lower blood glucose , a multitude of ancillary supplies and equipment available , and a clear recognition by health care professionals and patients that diabetes is a serious disease , the normalization of blood glucose for any appreciable period of time is seldom achieved ( 23 ) . In addition , in well-controlled socalled “ intensively ” treated patients , serious complications still occur ( 15–18,21 ) , and the economic and personal burden of diabetes remains . Furthermore , microvascular disease is already present in many individuals with undiagnosed or newly diagnosed type 2 diabetes ( 11,24– 28 ) . Given these facts , it is not surprising that studies have been initiated in the last decade to determine the feasibility and benefit of various strategies to prevent or delay the onset of  type 2 diabetes .  Two early reports ( 29,30 ) suggested that changes in lifestyle can prevent diabetes , but weaknesses in study design limited their general relevance . Recently , however , four well- design ed r and omized controlled trials have been reported ( 31–35 ) . In the Finnish study ( 31 ) , 522 middleaged ( mean age 55 years ) obese ( mean BMI 31 kg/m ) subjects with IGT were r and omized to receive either brief diet and exercise counseling ( control group ) or intensive individualized instruction on weight reduction , food intake , and guidance on increasing physical activity ( intervention group ) . After an average follow-up of 3.2 years , there was a 58 % relative reduction in the incidence of diabetes in the intervention group compared with the control subjects . A strong correlation was also seen between the ability to stop the progression to diabetes and the degree to which subjects were able to achieve one or more of the following : lose weight ( goal of 5.0 % weight reduction ) , reduce fat intake ( goal of 30 % of calories ) , reduce saturated fat intake ( goal of 10 % of calories ) , increase fiber intake ( goal of 15 g/1,000 kcal ) , and exercise ( goal of 150 min/week ) . No untoward effects of the lifestyle interventions were observed . In the Diabetes Prevention Program ( DPP ) ( 32–34 ) , the 3,234 enrolled subjects were slightly younger ( mean age 51 years ) and more obese ( mean BMI 34 kg/m ) but had nearly identical glucose intolerance compared with subjects in the Finnish study . About 45 % of the participants were from minority groups ( e.g , AfricanAmerican , Hispanic ) , and 20 % were 60 years of age . Subjects were r and omized to one of three intervention groups , which included the intensive nutrition and exercise counseling ( “ lifestyle ” ) group or either of two masked medication treatment groups : the biguanide metformin group or the placebo group . The latter interventions were combined with st and ard diet and exercise recommendations . After an average follow-up of 2.8 years ( range 1.8–4.6 years ) , a 58 % relative reduction in the progression to diabetes was observed in the lifestyle group ( absolute incidence 4.8 % ) , and a 31 % relative reduction in the progression of diabetes was observed in the metformin group ( absolute incidence 7.8 % ) compared with control subjects ( absolute incidence 11.0 % ) . ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● For decades , exercise has been considered a cornerstone of diabetes management , along with diet and medication . However , high- quality evidence on the importance of exercise and fitness in diabetes was lacking until recent years . The present document summarizes the most clinical ly relevant recent advances related to people with type 2 diabetes and the recommendations that follow from these . Our recently published technical review on physical activity/exercise and type 2 diabetes ( 1 ) includes greater detail on individual studies , on prevention of diabetes , and on the physiology of exercise . The present statement focuses on type 2 diabetes . Issues primarily germane to type 1 diabetes will be covered in a subsequent technical review and ADA Statement . The levels of evidence used are defined by the ADA in ref . 2 . Two r and omized trials each found that lifestyle interventions including ∼150 min/week of physical activity and  diet-induced weight loss of 5–7 % reduced the risk of progression from impaired glucose tolerance ( IGT ) to type 2 diabetes by 58 % ( 3,4 ) . A cluster-r and omized trial found that diet alone , exercise alone , and combined diet and exercise were equally effective in reducting the progression from IGT to diabetes ( 5 ) . Therefore , there is firm and consistent evidence that programs of increased physical activity  and modest weight loss reduce the incidence of type 2 diabetes in individuals with IGT . Boule et al. ( 6 ) undertook a systematic review and meta- analysis on the effects of structured exercise interventions in clinical trials of ≥8 weeks duration on HbA1c ( A1C ) and body mass in people with type 2 diabetes . Postintervention A1C was significantly lower in exercise than control groups ( 7.65 vs. 8.31 % , weighted mean difference −0.66 % ; P < 0.001 ) . In contrast , postintervention body weight did not differ between the exercise and control groups . Meta-regression confirmed that the beneficial effect of exercise on A1C OBJECTIVE —Impaired glucose tolerance ( IGT ) and /or impaired fasting glucose ( IFG ) are risk factors for diabetes , cardiovascular disease ( CVD ) , and kidney disease . We determined the effects of ramipril and rosiglitazone on combined and individual CVD and renal outcomes in people with IGT and /or IFG in the Diabetes REduction Assessment With ramipril and rosiglitazone Medication ( DREAM ) trial . RESEARCH DESIGN AND METHODS —A total of 5,269 people aged ≥30 years , with IGT and /or IFG without known CVD or renal insufficiency , were r and omized to 15 mg/day ramipril versus placebo and 8 mg/day rosiglitazone versus placebo . A composite cardiorenal outcome and its CVD and renal components were assessed during the 3-year follow-up . RESULTS —Compared with placebo , neither ramipril ( 15.7 % [ 412 of 2,623 ] vs. 16.0 % [ 424 of 2,646 ] ; hazard ratio [ HR ] 0.98 [ 95 % CI 0.84–1.13 ] ; P = 0.75 ) nor rosiglitazone ( 15.0 % [ 394 of 2,635 ] vs. 16.8 % [ 442 of 2,634 ] ; 0.87 [ 0.75–1.01 ] ; P = 0.07 ) reduced the risk of the cardiorenal composite outcome . Ramipril had no impact on the CVD and renal components .  Rosiglitazone  increased heart failure ( 0.53 vs. 0.08 % ; HR 7.04 [ 95 % CI 1.60–31.0 ] ; P = 0.01 ) but reduced the risk of the renal component ( 0.80 [ 0.68–0.93 ] ; P = 0.005 ) ; prevention of diabetes was independently associated with prevention of the renal component ( P < 0.001 ) . CONCLUSIONS —Ramipril did not alter the cardiorenal outcome or its components . Rosiglitazone , which reduced diabetes , also reduced the development of renal disease but not the cardiorenal outcome and increased the risk of heart failure Abstract Background Diabetes prevalence is increasing . The Finnish Diabetes Prevention Study ( DPS ) showed a 58 % reduction in Type 2 Diabetes ( T2D ) incidence in adults with impaired glucose tolerance ( IGT ) . The European Diabetes Prevention Study ( EDIPS ) extends the DPS to different European population s , using the same study design . In the Newcastle arm of this study ( EDIPS-Newcastle ) , we tested the hypothesis that T2D can be prevented by lifestyle intervention and explored secondary outcomes in relation to diabetes incidence . Methods We recruited 102 participants ( 42 men and 60 women , mean age 57 years , mean BMI 34 kgm-2 ) with IGT to EDIPS-Newcastle and r and omised to Intervention and usual care Control groups .  The intervention included individual motivational interviewing aim ed at : weight reduction , increase in physical activity , fibre and carbohydrate intake and reduction of fat intake ( secondary outcomes ) . The primary outcome was diagnosis of T2D . Results Mean duration of follow-up was 3.1 years . T2D was diagnosed in 16 participants ( I = 5 , C = 11 ) . Absolute incidence of T2D was 32.7 per 1000 person-years in the Intervention-group and 67.1 per 1000 person-years in the Control-group . The overall incidence of diabetes was reduced by 55 % in the Intervention-group , compared with the Control-group : RR 0.45 ( 95%CI 0.2 to 1.2).Explanatory survival analysis of secondary outcomes showed that those who sustained beneficial changes for two or more years reduced their risk of developing T2D . Conclusion Our results are consistent with other diabetes prevention trials . This study was design ed as part of a larger study and although the sample size limits statistical significance , the results contribute to the evidence that T2D can be prevented by lifestyle changes in adults with IGT . In explanatory analysis small sustained beneficial changes in weight , physical activity or dietary factors were associated with reduction in T2D incidence . Trial Registration International St and ard R and omised Controlled Trial Number registry ( IS RCT N)Registry number : IS RCT N 15670600 http://www.controlled-trials.com/is rct n/ search .html?srch=15670600%26sort=3%26dir = Summary Impaired glucose tolerance ( IGT ) is associated with increased mortality due to ischaemic heart disease ( IHD ) , but as it is not known whether this excess mortality can be reduced by preventing or delaying the development of non-insulin-dependent diabetes mellitus ( NIDDM ) , a long-term NIDDM prevention trial of dietary counselling and physical exercise was launched at Malmö , Sweden , the 12-year follow-up of which is reported here . At 12-year follow-up of 6956 men who underwent health screening at 48 years of age , an IGT intervention group ( n = 288 ) who participated in a long-term NIDDM prevention programme were compared with an IGT non-r and omised routine treatment group ( n = 135 ) , a diabetic group ( n = 144 ) , and the remainder , the normal glucose tolerance ( NGT ) group ( n = 6389 ) . The variables studied included the levels of blood glucose , plasma insulin , blood pressure , blood lipids , lung function and maximum oxygen uptake .  Subjects with IGT were characterised by overweight , poor vital capacity , hypertension , hypertriglyceridaemia and hyperinsulinaemia . The mortality rate in the IGT intervention group was similar to that in the NGT group ( 6.5 vs 6.2 per 1000 person years at risk ) and lower than that in the IGT routine treatment group ( 6.5 vs 14.0 , p = 0.009 ) . In the two IGT groups taken together , intervention but not body mass index , systolic blood pressure , smoking , cholesterol or the 2-h glucose level predicted mortality . Systolic blood pressure was a predictor of IHD mortality among IGT subjects ; and in the cohort as a whole , body mass index , systolic blood pressure , hypercholesterolaemica , diabetes and smoking were predictors of IHD mortality . The findings suggest that a long-term intervention programme , with an emphasis on lifestyle changes , including dietary counselling and physical exercise , will reduce mortality in subjects with IGT who are at an increased risk of both developing NIDDM and of premature death due to IHD and other causes . [ Diabetologia ( 1998 ) 41 : 1010–1016 Aims /hypothesisWe determined the effects of 6 years of lifestyle intervention in persons with impaired glucose tolerance ( IGT ) on the development of retinopathy , nephropathy and neuropathy over a 20 year period . Methods In 1986 , 577 adults with IGT from 33 clinics in Da Qing , China were r and omly assigned by clinic to a control group or one of three lifestyle intervention groups ( diet , exercise , and diet plus exercise ) . Active intervention was carried out from 1986 to 1992 . In 2006 we conducted a 20 year follow-up study of the original participants to compare the incidence of microvascular complications in the combined intervention group vs the control group . Results Follow-up information was obtained on 542 ( 94 % ) of the 577 original participants . The cumulative incidence of severe retinopathy was 9.2 % in the combined intervention group and 16.2 % in the control group ( p = 0.03 , log-rank test ) . After adjusting for clinic and age , the incidence of severe retinopathy was 47 % lower in the intervention group than the control group ( hazard rate ratio 0.53 , 95 % CI 0.29–0.99 , p = 0.048 ) . No significant differences were found in the incidence of severe nephropathy ( hazard rate ratio 1.05 , 95 % CI 0.16–7.05 , intervention vs control , p = 0.96 ) or in the prevalence of neuropathy ( 8.6 % vs 9.1 % , p = 0.89 ) among the 20 year survivors . Conclusions /interpretationLifestyle intervention for 6 years in IGT was associated with a 47 % reduction in the incidence of severe , vision-threatening retinopathy over a 20 year interval , primarily due to the reduced incidence of diabetes in the intervention group . However , similar benefits were not seen for nephropathy or neuropathy Prevention of type 2 diabetes by intensive lifestyle intervention design ed to achieve and maintain ideal body weight was assessed in subjects with impaired glucose tolerance ( IGT ) . Male subjects with IGT recruited from health-screening examinees were r and omly assigned in a 4:1 ratio to a st and ard intervention group ( control group ) and intensive intervention group ( intervention group ) . The final numbers of subjects were 356 and 102 , respectively . The subjects in the control group and in the intervention group were advised to maintain body mass index ( BMI ) of < 24.0 kg/m2 and of < 22.0 kg/m2 , respectively , by diet and exercise . In the intervention group , detailed instructions on lifestyle were repeated every 3 - 4 months during hospital visits . Diabetes was judged to have developed when two or more consecutive fasting plasma glucose ( FPG ) values exceeded 140 mg/dl . A 100 g oral glucose tolerance test was performed every 6 months to detect improvement of glucose tolerance . The subjects were seen in an ordinary outpatient clinic . The cumulative 4-year incidence of diabetes was 9.3 % in the control group , versus 3.0 % in the intervention group , and the reduction in risk of diabetes was 67.4 % ( P < 0.001 ) . Body weight decreased by 0.39 kg in the control group and by 2.18 kg in the intervention group ( P < 0.001 ) . The control group was subclassified according to increase and decrease in body weight . The incidence of diabetes was positively correlated with the changes in body weight , and the improvement in glucose tolerance was negatively correlated . Subjects with higher FPG at baseline developed diabetes at a higher rate than those with lower FPG . Higher 2h plasma glucose values and higher BMI values at baseline were also associated with a higher incidence of diabetes , but the differences were not significant . Subjects with a low insulinogenic index ( DeltaIRI/DeltaPG 30 min after an oral glucose load ) developed diabetes at a significantly higher rate than those with a normal insulinogenic index . Comparison of the BMI data and incidence of diabetes in five diabetes prevention studies by lifestyle intervention revealed a linear correlation between the incidence of diabetes and the BMI values , with the exception of the DaQing Study . However , the slope of the reduction in incidence of diabetes in the intensive intervention groups was steeper than expected simply on the basis of the reduction of BMI , suggesting that the effect of lifestyle intervention can not be solely ascribed to the body weight reduction . We conclude that lifestyle intervention aim ed at achieving ideal body weight in men with IGT  is effective and can be conducted in an outpatient clinic setting OBJECTIVE To investigate the effects of insulin resistance ( IR ) and insulin secretion ( IS ) on the development of diabetes mellitus in individuals with impaired glucose tolerance ( IGT ) who underwent lifestyle interventions .  METHODS 284 out of 577 individuals with IGT identified by population -based screening in Da Qing , China , who were r and omized to undergo diet change and /or increased physical activity  had baseline fasting and 2 h post-load insulin determinations . They were followed for 6 years for the development of diabetes . IR and IS were assessed using calculated indices based on fasting plasma insulin and glucose . The interactions of IR , IS , obesity and plasma glucose and the effects of the lifestyle interventions were evaluated using Cox Proportional Hazards analysis . RESULTS Both IR and IS were significantly associated with the development of diabetes . Lifestyle interventions were more effective in those with lower IT and higher IS at baseline . Diet plus exercise interventions result ed in significantly lower incidence of diabetes , even after controlling for IR , IS , BMI and 2hrPG . CONCLUSION Both IR and beta-cell function were predictors of diabetes in Chinese with IGT . Lifestyle intervention reduced the incidence of DM and these interventions were more effective in those with less IR BACKGROUND Intensive lifestyle interventions can reduce the incidence of  type 2 diabetes in people with impaired glucose tolerance , but how long these benefits extend beyond the period of active intervention , and whether such interventions reduce the risk of cardiovascular disease ( CVD ) and mortality , is unclear . We aim ed to assess whether intensive lifestyle interventions have a long-term effect on the risk of diabetes , diabetes-related macrovascular and microvascular complications , and mortality . METHODS In 1986 , 577 adults with impaired glucose tolerance from 33 clinics in China were r and omly assigned to either the  control group or to one of three lifestyle intervention groups ( diet , exercise , or diet plus exercise ) . Active intervention took place over 6 years until 1992 . In 2006 , study participants were followed-up to assess the long-term effect of the interventions . The primary outcomes were diabetes incidence , CVD incidence and mortality , and all-cause mortality . FINDINGS Compared with control participants , those in the combined lifestyle intervention groups had a 51 % lower incidence of diabetes ( hazard rate ratio [ HRR ] 0.49 ; 95 % CI 0.33 - 0.73 ) during the active intervention period and a 43 % lower incidence ( 0.57 ; 0.41 - 0.81 ) over the 20 year period , controlled for age and clustering by clinic . The average annual incidence of diabetes was 7 % for intervention participants versus 11 % in control participants , with 20-year cumulative incidence of 80 % in the intervention groups and 93 % in the control group . Participants in the intervention group spent an average of 3.6 fewer years with diabetes than those in the control group . There was no significant difference between the intervention and control groups in the rate of first CVD events ( HRR 0.98 ; 95 % CI 0.71 - 1.37 ) , CVD mortality ( 0.83 ; 0.48 - 1.40 ) , and all-cause mortality ( 0.96 ; 0.65 - 1.41 ) , but our study had limited statistical power to detect differences for these outcomes . INTERPRETATION Group-based lifestyle interventions over 6 years can prevent or delay diabetes for up to 14 years after the active intervention . However , whether lifestyle intervention also leads to reduced CVD and mortality remains unclear OBJECTIVE —We investigated whether circulating adipokine concentrations can be altered by lifestyle intervention according to general recommendations in subjects at risk for diabetes as well as the potential of leptin , adiponectin , and resistin as biomarkers for lifestyle-induced improvements in glucose metabolism and insulin resistance . RESEARCH DESIGN AND METHODS —In the Study on Lifestyle intervention and Impaired glucose tolerance Maastricht , 147 men and women with impaired glucose tolerance ( IGT ) were r and omized to either a combined diet- and -exercise intervention or a control program . At baseline and after 1 year , an oral glucose tolerance test , an exercise test , and anthropometric measurements were performed . After 1 year , complete data of 103 subjects ( 50 intervention and 53 control subjects ) were obtained . RESULTS —Lifestyle intervention reduced plasma leptin concentrations ( −14.2 % ) in IGT subjects but did not alter plasma adiponectin ( −0.3 % ) or resistin ( −6.5 % ) concentrations despite marked improvements in glucose tolerance and insulin resistance . CONCLUSIONS —Changes in leptin concentration were related to improvements in insulin sensitivity independent of changes in body composition CONTEXT Living in a prediabetes state significantly increases a patient 's risk for both diabetes and cardiovascular disease .  Tianqi capsule , containing 10 Chinese herbal medicines , is used in China for the treatment of type 2 diabetes mellitus ( T2DM ) . OBJECTIVE The purpose of this study was to assess whether Tianqi prevented T2DM in subjects with impaired glucose tolerance ( IGT ) over the course of a 12-month treatment . METHODS Individuals with IGT were r and omly allocated in a double-blind manner to receive Tianqi ( n = 210 ) or a placebo ( n = 210 ) for 12 months . Oral glucose tolerance tests were conducted every 3 months to assess the development of diabetes or restoration to normal glucose tolerance . All subjects received the same lifestyle education . The primary endpoint was the conversion of IGT to T2DM . Body weight and body mass index were observed . Adverse effects were monitored . RESULTS Of the 420 enrolled subjects with IGT , 389 completed the trial ( 198 in the Tianqi group and 191 in the placebo group ) . At the end of the 12-month trial , 36 subjects in the Tianqi group ( 18.18 % ) and 56 in the placebo group ( 29.32 % ) had developed diabetes ( P = .01 ) . There was a significant difference in the number of subjects who had normal glucose tolerance at the end of the study between the Tianqi and placebo groups ( n = 125 , 63.13 % , and n = 89 , 46.60 % , respectively ; P = .001 ) . Cox 's proportional hazards model analysis showed that Tianqi reduced the risk of diabetes by 32.1 % compared with the placebo . No severe adverse events occurred in the trial . There were no statistical differences in body weight and body mass index changes between the Tianqi group and the placebo group during the 12-month trial . CONCLUSIONS Treatment with a Tianqi capsule for 12 months significantly decreased the incidence of T2DM in subjects with IGT , and this herbal drug was safe to use Aims /hypothesisThe aim of this study was to determine the frequency of undiagnosed glucose abnormalities and the burden of cardiovascular disease ( CVD ) risk among south Asians and white Europeans attending a systematic screening programme for type 2 diabetes ( ADDITION-Leicester ) and to estimate the achievable risk reduction in individuals identified with glucose disorders . Methods R and om sample s of individuals ( n = 66,320 ) from 20 general practice s were invited for a 75 g OGTT and CVD risk assessment .  Ten-year CVD risk among screen-detected people with diabetes or impaired glucose regulation ( IGR )  ( impaired fasting glycaemia and /or impaired glucose tolerance [ IGT ] ) was computed using the Framingham-based ETHRISK engine and achievable risk reduction was predicted using relative reductions for treatments extracted from published trials . Results A total of 6,041 participants ( 48 % male , 22 % south Asian ) aged 40–75 years inclusive were included .  Undiagnosed glucose disorders occurred more frequently in south Asians than white Europeans ; age and sex adjusted odds ratios were 1.74 ( 95 % CI 1.42–2.13 ) and 2.30 ( 95 % CI 1.68–3.16 ) for IGT and diabetes respectively . Prevalence of any undetected glucose disorder was 17.5 % in the whole cohort . Adjusted 10-year risk was similar in screen-detected people with IGR and diabetes ( 18.3 % vs 21.6 % ) , and was higher in south Asians across the glucose spectrum . Absolute CVD risk reductions of up to 13 % in those with screen-detected type 2 diabetes and 6 % in IGR are achievable using existing cardioprotective therapies . Conclusions /interpretation Population screening with an OGTT identifies a significant burden of modifiable CVD risk , especially within south Asian groups . Strategies enticing this population to consider screening programmes are urgently needed as significant risk reduction is possible once a glucose abnormality is identified . Trial registration : Clinical Trials.gov NCT00318032 Funding : The project is funded for support and treatment costs by NHS Department of Health Support for Science and project grants The study on lifestyle-intervention and impaired glucose tolerance Maastricht ( SLIM ) is a 3 years r and omised clinical trial design ed to evaluate the effect of a combined diet and physical activity intervention program on glucose tolerance in a Dutch population at increased risk for developing type 2 diabetes . Here the design of the lifestyle-intervention study is described and results are presented from the preliminary population screening , conducted between March 1999 and June 2000 . In total , 2,820 subjects with an increased risk of having disturbances in glucose homeostasis ( i.e. age > 40 years and BMI > 25 kg/m(2 ) or a family history of diabetes ) underwent a first oral glucose tolerance test ( OGTT ) . Abnormal glucose homeostasis was detected in 826 subjects ( 30.4 % ) : 226 type 2 diabetes ( type 2DM , 8.3 % ) , 215 impaired fasting glucose ( IFG , 7.9 % ) and 385 impaired glucose tolerance ( IGT , 14.2 % ) . Both increasing age and BMI were strongly related to the prevalence of IGT and diabetes . After a second OGTT , 114 subjects with glucose intolerance and in otherwise good health were eligible for participation in the intervention study ( SLIM ) . The high prevalence of disturbances in glucose homeostasis observed in the preliminary screening underscore the importance of early ( lifestyle ) interventions in those at risk for developing diabetes . SLIM will address this topic in the Dutch population Objectives To determine the effects of a lifestyle intervention on the development of type 2 diabetes mellitus ( T2DM ) among participants with impaired glucose tolerance ( IGT ) , in particular in the subgroup with baseline glycated hemoglobin ( HbA1c ) levels ≥5.7 % , in primary healthcare setting s. Design R and omized controlled trial . Setting 32 healthcare centers in Japan . Participants Participants with IGT , aged 30–60 years , were r and omly assigned to either an intensive lifestyle intervention group ( ILG ) or a usual care group ( UCG ) . Interventions During the initial 6 months , participants in the ILG received four group sessions on healthy lifestyles by public health providers . An individual session was further conducted biannually during the 3 years . Participants in the UCG received usual care such as one group session on healthy lifestyles . Outcome measures The primary endpoint was the development of T2DM based on an oral glucose tolerance test . Results The mean follow-up period was 2.3 years . The annual incidence of T2DM were 2.7 and 5.1/100 person-years of follow-up in the ILG ( n=145 ) and UCG ( n=149 ) , respectively . The cumulative incidence of T2DM was significantly lower in the ILG than in the UCG among participants with HbA1c levels ≥5.7 % ( log-rank=3.52 , p=0.06 ; Breslow=4.05 , p=0.04 ; Tarone-Ware=3.79 , p=0.05 ) , while this was not found among participants with HbA1c levels < 5.7 % . Conclusions Intensive lifestyle intervention in primary healthcare setting is effective in preventing the development of T2DM in IGT participants with HbA1c levels ≥5.7 % , relative to those with HbA1c levels < 5.7 % . Trial registration number UMIN000003136
Similar effects also appeared in SBP and DBP categories regardless of follow-up duration .
PA+D interventions had larger improvement effects on CVD risk factors than PA alone interventions .
In adults without IGT or diabetes , lifestyle interventions result ed in significant improvements in SBP , DBP , TC , LDL-C , HDL-C , and TG , and might further reduce CVD risk
Structured lifestyle interventions can reduce diabetes incidence and cardiovascular disease ( CVD ) risk among persons with impaired glucose tolerance ( IGT ) , but it is unclear whether they should be implemented among persons without IGT .
We conducted a systematic review and meta-analyses to assess the effectiveness of lifestyle interventions on CVD risk among adults without IGT or diabetes .