Similarly , there was no clear evidence of effect for cardiovascular risk factors , although again the number of studies reporting these was small .
There was some evidence for beneficial effects on HRQOL , dietary outcomes , and physical activity , although firm conclusions can not yet be made .
The effects on healthcare utilisation and cost-effectiveness are also inconclusive , and trials are yet to measure the impact of  Internet interventions on compliance with medication .
BACKGROUND The Internet could provide a means of delivering secondary prevention programmes to people with coronary heart disease ( CHD ) .
OBJECTIVES To determine the effectiveness of Internet-based interventions targeting lifestyle changes and medicines management for the secondary prevention of CHD .
Web-Based Targeted Nutrition Counselling and Social Support for Patients at Increased Cardiovascular Risk in General Practice: Randomized Controlled Trial
Background Using the Internet may prove useful in providing nutrition counselling and social support for patients with chronic diseases . Objective We evaluated the impact of Web-based nutrition counselling and social support on social support measures , anthropometry , blood pressure , and serum cholesterol in patients at increased cardiovascular risk . Methods We conducted a r and omized controlled trial among patients with increased cardiovascular risk in Canadian family practice s. During 8 months , patients in the intervention group and control groups received usual care . Patients in the intervention group also had access to a Web-based nutrition counselling and social support tool ( Heartweb ) . Site use during the study was monitored . We measured social support , body mass index , waist/hip ratio , blood pressure , and cholesterol levels at baseline and at 4 and 8 months to assess the effectiveness of the intervention . Results We r and omized 146 patients into the Web-based intervention ( n=73 ) or the control group ( n=73 ) . Within the Web-based intervention group , Heartweb was used by only 33 % ( 24/73 ) of patients , with users being significantly younger than nonusers ( P=.03 ) . There were no statistically significant differences between the intervention group and the control group in changes in social support , anthropometry , blood pressure , and serum cholesterol levels . Conclusions Uptake of the Web-based intervention was low . This study showed no favourable effects of a Web-based nutrition counselling and social support intervention on social support , anthropometry , blood pressure , and serum cholesterol . Improvements in reach and frequency of site use are needed to increase the effectiveness of Web-based interventions
Similarly , there was no clear evidence of effect for cardiovascular risk factors , although again the number of studies reporting these was small .
There was some evidence for beneficial effects on HRQOL , dietary outcomes , and physical activity , although firm conclusions can not yet be made .
The effects on healthcare utilisation and cost-effectiveness are also inconclusive , and trials are yet to measure the impact of  Internet interventions on compliance with medication .
BACKGROUND The Internet could provide a means of delivering secondary prevention programmes to people with coronary heart disease ( CHD ) .
OBJECTIVES To determine the effectiveness of Internet-based interventions targeting lifestyle changes and medicines management for the secondary prevention of CHD .