Time trends in comorbidity and management of hypertension and self-reported diabetes: A 15-year nationwide longitudinal study in China.

OBJECTIVES To examine time trends in comorbidity of hypertension and self-reported type 2 diabetes (T2DM) and their diagnosis, treatment, and management in China during 2000-2015 and study factors associated with these outcomes. METHODS Longitudinal data collected from the China Health and Nutrition Survey (CHNS) during 2000-2015 were analyzed. 143, 351 and 338 had both hypertension and self-reported T2DM were selected in 2000, 2011 and 2015, respectively. Average systolic blood pressure (SBP) and diastolic blood pressure (DBP) and hypertension prevalence among T2DM participants, and treatment and control of hypertension and self-reported T2DM among participants with both conditions were examined for all and by sex and weight status. Poisson regression model assessed the associations. RESULTS From 2000 to 2015, among participants with self-reported T2DM, hypertension prevalence dropped from 88.4% to 83.0% and BPs decreased (P < 0.05). Men and overweight/obese participants had greater decreases in hypertension prevalence and DBP, while women had a larger decrease in SBP than men. Over time, among participants with both hypertension and self-reported T2DM, rates of hypertension treatment (45.3% to 57.7%), hypertension control (3.0% to 10.9%) and self-reported T2DM treatment (90.0% to 95.6%) increased (all P < 0.001). Older, women, ever-smoking, heavier drinking, better income level, higher education level, and obesity had higher rates of prevalence, treatment, and control of hypertension, and self-reported T2DM treatment among participants with both hypertension and self-reported T2DM. CONCLUSIONS Rates of hypertension treatment and control among participants with both hypertension and self-reported T2DM have improved in recent years, but were still low.