GENG Xiaoliang, TANG Fengyuan, TAN Gangrui, JIN Shengxuan
Objective To systematically evaluate the prevalence trends and influencing factors of overweight and obesity among older adults in China from 2008 to 2018, providing a basis for optimizing the prevention and control policies and intervention strategies for obesity among older adults. Methods Based on the data from Chinese Longitudinal Healthy Longevity Survey (CLHLS), 27,363 older adults aged ≥60 years in 2008, 2011, 2014 and 2018 were included, and overweight and obesity were classified by the BMI index. The chi-square test, T-test, ANOVA, and rank sum test were performed by using SPSS 23.0. The binary logistic regression model was applied to identify factors influencing overweight or obesity and its changes. Results The overall overweight prevalence of the subjects increased from 11.84% in 2008 to 25.46% in 2018, and the obesity prevalence rose from 2.82% to 8.49%. The overweight prevalence and obesity prevalence significantly decreased with advancing age, which were higher in urban areas than in rural areas. The overweight Prevalence of women was higher than that of men, and the obesity prevalence of men was higher than that of women. Risk factors influencing overweight or obesity of the subjects included higher living standards (OR=1.178), being married (OR=1.147), chronic diseases (OR=1.740), and a high intake of staple foods (OR=1.236), etc. Protective factors included a light diet (OR=0.838), smoking (OR=0.759), and a high frequency of raising livestock or pets (OR=0.913). Older adults who were married, rarely experienced hunger in childhood, had chronic diseases, consumed vegetables less frequently, drank alcohol and did not smoke were more likely to be overweight or obese. Conclusions The prevalence of overweight and obesity among Chinese older adults showed a year-by-year increase, with notable urban-rural disparities. Factors such as health status, diet and lifestyle behaviors significantly influenced their occurrence.