Objective: To explore the association between socioeconomic status (SES) and overweight/obesity in Yi people in Sichuan province. Methods: A cross-sectional study was conducted in Liangshan Yi Autonomous Prefecture in 2015. Stratified cluster sampling method was used to enroll Yi farmers and rural-to-urban Yi migrants aged 20-80 years. SES was measured by education level, personal annual income, and compound SES index. Unconditional logistic regression models were used to determine the association between SES and overweight/obesity (BMI≥24.0 kg/m(2)). Results: 1 894 Yi farmers and 1 162 rural-to urban migrants were included in the analysis. After adjustment for age, smoking, drinking and physical activity, compared with illiteracy, OR for farmer males with higher education level (primary or junior school, senior high school or higher) were 1.71 (95%CI: 1.13-2.58) and 4.15 (95%CI: 2.10-8.22). Compared with lower income group (<5 000 CNY/y), the higher income group had increased risk (OR=1.66, 95%CI: 1.12-2.44). For farmer males with medium and high SES level, the risk of overweight/obesity were 1.65 (95%CI: 1.02-2.67) and 3.26 (95%CI: 1.97-5.42) compared with low level of SES. For farmer females, the risk increased with the higher income, with OR as 1.49 (95%CI: 1.10-2.02). Compared with low SES level, farmer females with medium level of SES was associated with 1.47 (95%CI: 1.11-1.95) times higher risk of overweight/obesity. In Yi migrants, the association between SES and overweight/obesity was not found. Conclusion: Socioeconomic status was positively associated with overweight/obesity only in Yi farmers.
目的： 探讨四川凉山彝族社会经济状况（SES）与超重/肥胖的关系。 方法： 采用分层整群抽样的方法，在凉山彝族自治州开展横断面调查，对20~80岁彝族农民和城镇移民社会经济状况与超重/肥胖的关系进行研究。以文化程度、个人年收入、SES综合指标作为社会经济状况的指标。用非条件logistic回归模型分析社会经济状况与超重/肥胖（BMI≥24.0 kg/m(2)）的关系。 结果： 共纳入彝族农民1 894人，彝族移民1 162人。调整年龄、吸烟、饮酒、体力活动后，相对于文盲，彝族农民男性文化程度较高组（小学及初中、高中及以上）超重/肥胖OR值分别为1.71（95%CI：1.13~2.58）、4.15（95%CI：2.10~8.22）；年收入≥5 000元组相比于<5 000元组OR值为1.66（95%CI：1.12~2.44）；中、高SES综合指标组相比于低SES组OR值为1.65（95%CI：1.02~2.67）、3.26（95%CI：1.97~5.42）。彝族农民女性年收入≥5 000元组相比于<5 000元组OR值为1.49（95%CI：1.10~2.02）；中SES综合指标组相比于低SES综合指标组OR值为1.47（95%CI：1.11~1.95）。彝族移民中，未发现社会经济状况与超重/肥胖存在显著性关联。 结论： 彝族农民社会经济状况与超重/肥胖存在正向关联。.
Keywords: Migrant epidemiology; Overweight/obesity; Socioeconomic status; Yi people.