Influencing factors of type 2 diabetes mellitus among community residents in Dalian city: a case-control study

Objective To analyze influencing factors of type 2 diabetes mellitus(T2DM)among community residents in Dalian city and to provide references for making preventive strategies and interventions in the city.Methods With cluster sampling method,2 396 residents without T2DM diagnosis and aged ≥40 years were recruited from six communities in Dalian city and surveyed with a questionnaire interview,physical examination,and laboratory tests from August to December 2011.Then the 1 177 participants with T2DM were assigned into a case group and other 1 219 without the disease into a control group based on the results of laboratory tests.Factors associated with T2DM were compared between the cases and the controls.Results The cases showed higher proportions than the controls for alcohol drinking(31.78% vs.24.36%),taking meat ≥3 times per day (25.32% vs.21.82%),overweight (44.27% vs.43.40%),obesity (42.23% vs.21.00%),abdominal obesity (73.41% vs.48.97%),with familial history of diabetes (22.60% vs.18.79%),with familial history of hypertension (69.67% vs.42.82%),with a higher but not abnormal total cholesterol (TC) (38.40% vs.37.57%),with high TC (27.78% vs.18.95%),with a higher but not abnormal triglyceride(TG) (16.65% vs.10.83%),with high TG (26.51% vs.10.67%),with a higher but not abnormal low-density lipoprotein cholesterol (LDL-C) (31.01% vs.26.17%),and with high LDL-C (19.12% vs.12.80%);while the proportion of frequent physical activity was significantly lower in the cases than in the controls (14.87% vs.18.70%,P<0.05).The results of multivariate logistic regression analysis showed that the risk factors of T2DM included alcohol drinking,overweight or obesity,abdominal obesity,high TG,high LDL-C,hypertension,and familial history of diabetes and the protective factor was frequent physical activity.Conclusion The major influencing factors of T2DM are alcohol drinking,body mass index,waist hip ratio,familial history of diabetes,blood pressure,TG content,and LDL-C level among community residents of Dalian city.