The association between sleep duration and incidence of hypertension and diabetes – a Fasa Adults Cohort Study (FACS)

Sleep is one of the most important physiological necessity for human, which is vital for maintaining good health, and insufficient sleep can raise the risk of serious medical conditions. Therefore, this study was aimed to determine the relationship between sleep duration and the incidence of hypertension and diabetes in southwestern Iran. This prospective cohort study, named Fasa Persian Adult Cohort(FACS) comprised of a total of 8735 non-diabetic subjects and 7935 non-hypertensive subjects, was conducted and followed the individuals for 7 years to investigate the incidence of diabetes and hypertension. The daily sleep hours of all participants was determined, and the incidence of diabetes and hypertension were calculated. Cox regression analysis and hazard ratio (HR) estimation were used for further evaluations. After a follow-up of 7 years, 312 (3.9%) and 327 (3.7%) of the participants were diagnosed with hypertension and diabetes, respectively. According to the results of multiple Cox regressions, the lower risk of hypertension was associated with increased sleep hours (HR: 0.90, CI95%:0.84-0.96). However, the risk of diabetes was not significantly associated with sleep duration. Based on the results, short sleep among Iranian adults can be a significant predictor for the occurrence of hypertension, and it can to be designated as a risk factor for hypertension.