| Backgrounds and ObjectivesIn recent decades, obesity had become one of the most important health problems in the world. In some developed countries, the prevalence of obesity was high and increased rapidly, while in developing countries, with the development of economy, the lifestyle of people had changed a lot, such as diet and behavior. The prevalence of obesity and chronic diseases associated with obesity increased sharply. In 2002, the National Health and Nutrition Survey of China suggested that the prevalence of adult overweight and obesity were significantly higher than those of 1990s. The prevalence rate of adult overweight and obesity was 22.8% and 7.1%, respectively. It should be noted that the rate of adults overweight and obesity increased significantly in rural areas of China, as the improvement of the production and living conditions.To realize the epidemiological characteristics of overweight and obesity among rural people aged 30 and above and provide scientific basis for prevention and control of overweight and obesity, we conducted a questionnaire survey and physical measurement in representative rural residents of Jiashan county in Zhejiang province by using the typical multi-stage sampling method.Material and methodsBased on the data of 13068 residents aged at least 30 from rural areas of Zhejiang province who participated in health survey in 2010. Data of height, weight, waist circumference, hip-circumference and socio-demographic factors (age, sex) was included in the survey, their body mass index (BMI) and waist-to-hip rate were calculated. According to the recommended cut-offs of "Chinese adult overweight and obesity prevention and control guidelines" for determining obesity, and analyze the rate of overweight and obesity according to socio-demographic factors, such as gender and age. Logistic regression analysis was used to identify the socio-demographic factors associated with overweight and obesity.Results1. Description of physical measurementsThe mean of BMI, height, weight, waist circumference (WC), hip circumference (HC), waist to hip(WHR) of the objects were 161.10±7.66cm,62.04±9.36kg,79.82±8.20cm,92.24±6.54cm,23.89±3.12 kg/m2and 0.86±0.05, respectively. The mean of BMI, height, weight, waist circumference (WC), hip circumference (HC), waist to hip(WHR)of the men were 162.10±7.73cm,62.48±9.64kg,79.37±8.29cm,91.88±6.08cm,23.53±3.05 kg/m2and 0.86±0.05, respectively. And those of women were 159.96±7.40cm,61.75±9.16kg,80.10±8.13cm,92.48±6.81cm,24.12±3.14 kg/m2 and 0.87±0.05, respectively.2. Detection of overweight and obesityThe crude prevalence of overweight and obesity were 35.95% and 10.91%, and the age-adjusted rates were 35.93% and 9.71%, respectively. The age-adjusted rates of overweight and obesity in females (37.78%,10.85%) were higher than those in males (32.93%,7.92%) (P< 0.001). The prevalence rate of overweight and obesity in single men (49.04%,8.28%) were higher than married men (33.15%,8.00%).The rate of overweight in both sexes who were married was higher than those of the singles. The rate of obesity in both sexes who were single was higher than those of the married. The rate of overweight in the men who never attended school was highest (33.47%). The rate of obesity in the men who had attended primary schools was highest (8.52%). The rate of overweight in the women who never attended school was highest (37.69%). the rate of obesity in the women who attended middle school and above was highest (11.20%). The rate of overweight in men whose annual family income between 30000 and 50000 was the highest (34.15%), while the obesity rate of whom annual family income less than 10,000 was highest (9.26%). The overweight and obesity rate of female whose annual family income less than 10,000 were the highest (42.35%and 11.18%).3. Detection of abdominal obesityThe prevalence rate of abdominal obesity in adults was 42.00%. The age-adjusted abdominal obesity rate of women (55.54%) was significant higher than which of men (25.41%) (P< 0.001). The proportion of abdominal obesity in both sexes who were overweight was 51.06% and 77.08%, respectively. The proportion of abdominal obesity in both sexes who were obesity was 92.70% and 96.42%, respectively. The prevalence rate of abdominal obesity in both sexes who were married (27.14%,51.76%) was significant higher than those of the single (24.20%,48.37%). The prevalence rate of abdominal obesity in men who had primary school and above was higher than that of who never attended school. On the contrary, the prevalence rate of abdominal obesity in women who never attended school was highest. The prevalence rate of abdominal obesity of both sexes whose annual family income more than 50,000 was the highest (27.72%,52.35%). 4. Risk assessmentThe prevalence rate of abdominal obesity for the men aged between 55 and 59 years was significantly higher than that of the men aged between 30 and 39 years (P<0.05).ConclusionThis study was set out to investigate the prevalence of overweight and obesity. The study found that the rural adult of Zhejiang province has higher levels of overweight and obesity among both sexes. Overweight and obesity have become an important public health problem in rural adults of Zhejiang province. Programs and other interventions aimed at both overweight and obesity need to be developed.
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