Compared with their nondiabetic counterparts , cancer patients with preexisting diabetes are ∼50 % more likely to die after surgery .
OBJECTIVE Diabetes appears to increase risk for some cancers , but the association between preexisting diabetes and  postoperative mortality in cancer patients is less clear .
Our objective was to systematic ally review postoperative mortality in cancer patients with and without preexisting diabetes and summarize results using meta- analysis .
The effect of diabetes mellitus on patients undergoing coronary surgery: a risk-adjusted analysis.
BACKGROUND Surgical case-mix is seriously worsening , and the results of surgical revascularization on high-risk cohorts should be continuously evaluated . This study investigates the influence of diabetes mellitus on the short and midterm outcome in the modern era of coronary surgery . METHODS AND RESULTS Patients who underwent first-time coronary artery bypass grafting from April 1996 to October 2003 were classified into diabetic and nondiabetic groups . Data were prospect ively collected and retrospectively analyzed . A total of 5259 patients were studied , and of these 877 ( 17 % ) were diabetic . Patients with diabetes were more likely to be female , have a higher body mass index , be in an advanced New York Heart Association class and Canadian Cardiovascular Society class , have a history of congestive heart failure , have a poor ejection fraction , renal failure , and more extensive coronary artery disease than the nondiabetic group ( P < .001 for all ) . In-hospital mortality was 2.2 % and 1 % for diabetic and nondiabetic patients , respectively ; however , diabetes was not found to be an independent risk factor for in-hospital mortality ( odds ratio = 1.63 ; 95 % confidence interval 0.92 - 2.88 ; P = .089 ) . Postoperative complications were comparable in the two groups , with only renal , neurologic , and gastrointestinal complications significantly associated with diabetes ( all P < or = .05 ) . There was no association between diabetes mellitus and postoperative infective complications . Diabetes remained an independent predictor of 5-year mortality ( hazard ratio 1.55 ; 95 % confidence interval 1.22 - 1.96 ; P < .001 ) and of lower 5-year cardiac-related event-free survival . CONCLUSION Despite a worsening cohort , diabetic patients could be surgically revascularized with low morbidity and mortality , comparable with control patients . The negative effect of diabetes mellitus on the longer-term mortality and morbidity remains a problem
Compared with their nondiabetic counterparts , cancer patients with preexisting diabetes are ∼50 % more likely to die after surgery .
OBJECTIVE Diabetes appears to increase risk for some cancers , but the association between preexisting diabetes and  postoperative mortality in cancer patients is less clear .
Our objective was to systematic ally review postoperative mortality in cancer patients with and without preexisting diabetes and summarize results using meta- analysis .