Background
The measures of socioeconomic status (SES) differed across divergent researches and rare of them focused on rural population. This research, thus, presented a novel measure of SES among rural population and then estimated its association with type 2 diabetes mellitus (T2DM).
Methods
All participants were farmer and enrolled from the Henan Rural Cohort study. SES of individual was assessed by SES-score, a composite index derived from three SES-related indicators (education level, average monthly income, and marital status). Binary logistic regression was employed to examine the independent association between SES-score and T2DM as well as the combined effects of SES and age on T2DM. To detect the gender differences, all analyses were stratified by gender.
Results
Among 39259 rural participants, the means (SDs) SES-score of total population, men, and women were 3.47 (1.54), 3.72 (1.49), and 3.31 (1.57), respectively. The SES-score decreased with age and men always had a higher score than women. The prevalence of T2DM decreased with increasing SES-score among women (14.87–4.47%, P trend <0.001), while an inverse trend was observed among men (6.59–9.87%, P trend <0.001). Adjusted ORs (95%CIs) for prevalent T2DM, per unit increase, were 1.07 (1.03, 1.12) in men and 0.96 (0.93, 0.99) in women. Old men with high SES and old women with low SES were vulnerable to T2DM.
Conclusions
Men had a higher SES-score than women in rural areas, and this gap increased with age. The association between SES and T2DM was differed by gender.
Trail Registration:
The Henan Rural Cohort Study has been registered at Chinese Clinical Trial Register (Registration number: ChiCTR-OOC-15006699). Date of registration: 06 July, 2015. http://www.chictr.org.cn/showproj.aspx?proj=11375