Association between obesity indices and type 2 diabetes mellitus among middle-aged and elderly people in Jinan, China: a cross-sectional study.
The relationship between obesity and type 2 diabetes mellitus (T2DM) varies with geographical area and race.



To investigate the prevalence of T2DM and the proportion of subjects with undiagnosed T2DM. In addition, to compare the associations between different obesity indices and T2DM for middle-aged and elderly people from six communities in Jinan, China.



A cross-sectional study was designed and the study subjects were chosen from blocks which were randomly selected in the 6 communities of Jinan, China in 2011-2012.



A total of 3277 residents aged ≥50 years were eligible for this study, but 1563 people were excluded because they did not provide anthropometric data such as height, weight, waist circumference (WC), hip circumference, systolic blood pressure, diastolic blood pressure, fasting plasma glucose, triglyceride (TG), total cholesterol (TC) or information about their current medication use. Hence, 1714 participants were included in the final data analysis.



The prevalence of T2DM among people aged ≥50 years was 16.6% (19.3% for men and 15.3% for women) and the proportion of patients with undiagnosed T2DM was 32.7%. Compared with the lowest levels of body mass index (BMI), WC, waist-to-hip ratio or waist-to-stature ratio (WSR), the ORs and 95% CIs of the highest levels for men, after adjusting for age, smoking, alcohol drinking, regular exercise, hypertension, TG and TC, were 1.607 (0.804 to 3.210), 2.189 (1.118 to 4.285), 1.873 (0.968 to 3.623) and 2.572 (1.301 to 5.083), respectively, and for women, 2.764 (1.622 to 4.712), 2.407 (1.455 to 3.985), 2.500 (1.484 to 4.211) and 2.452 (1.447 to 4.155), respectively.



Among adults aged ≥50 years in Jinan, China, the best indicator of the relationship between obesity and T2DM is WSR for men and BMI for women, respectively.
Department of Biostatistics, School of Public Health, Shandong University, Jinan, China.
Shukang
S
Wang
Department of Epidemiology, School of Public Health, Shandong University, Jinan, China.
Wei
W
Ma
Department of Biostatistics, School of Public Health, Shandong University, Jinan, China.
Zhongshang
Z
Yuan
Department of Epidemiology, School of Public Health, Shandong University, Jinan, China.
Shu-Mei
SM
Wang
The College of Physical Education, Shandong University, Jinan, China.
Xiangren
X
Yi
The Second Hospital of Shandong University, Jinan, China.
Hongying
H
Jia
Department of Biostatistics, School of Public Health, Shandong University, Jinan, China.
Fuzhong
F
Xue
D000368:Aged; D000886:Anthropometry; D001786:Blood Glucose / Q000378:metabolism; D001794:Blood Pressure; D015992:Body Mass Index; D002681:China / Q000453:epidemiology; D003430:Cross-Sectional Studies; D003924:Diabetes Mellitus, Type 2 / Q000097:blood / Q000453:epidemiology* / Q000209:etiology; D005260:Female; D006801:Humans; D008055:Lipids / Q000097:blood; D008297:Male; D008875:Middle Aged; D009765:Obesity / Q000097:blood / Q000150:complications*; D012111:Residence Characteristics; D012307:Risk Factors; D055105:Waist Circumference; D065927:Waist-Height Ratio; D049629:Waist-Hip Ratio
D001786:Blood Glucose; D008055:Lipids
Chinese population; cross-sectional study; obesity indices; type 2 diabetes mellitus (T2DM)