Objective: To investigate the type 2 diabetes mellitus (T2DM) prevalence and related risk factors in adult population with obesity in Tianjin.
Methods: With stratified cluster randomized sampling, 2888 obese people with BMI ≥ 28 kg/m(2), aged 18 years old and over were selected from three urban and three rural regions of Tianjin, in 2006. Information on risk factors was collected with questionnaire through face-to-face interview by trained workers and data on fasting blood glucose (FBG) was collected at the same time. 2hrPPG was tested among the people who's FBG ≥ 6.1 mmol/L at the hospital. Prevalence of T2DM was calculated and the distribution of T2DM in the described subgroups and the risk factors analyzed with SPSS software.
Results: The prevalence of T2DM in adult population with obesity was 11.74%, with females (13.90%) higher than males (8.75%). The prevalence rates of T2DM were statistically different among different groups, classified by age, education, occupation, district and BMI. Results from the univariate and multivariate logistic regression analysis showed that the risk factors of T2DM were age (OR = 1.383, 95%CI: 1.254 - 1.525) and sex (OR = 1.591, 95%CI: 1.230 - 2.059) while the protective factor was fruit intake (OR = 0.867, 95%CI: 0.774 - 0.971).
Conclusion: The prevalence of T2DM in adult with obesity was considered to be high. The distribution of T2DM in different subgroups and affecting factors of T2DM in obese adults were different from general population.