Objective  To analyze prevalence of hypertension and diabetes in senile people in China and related factors of hypertension complicated with diabetes.

  Methods  Cross-sectional data of 2018 in Chinese Longitudinal Healthy Longevity Survey (CLHLS) were collected for calculation of prevalence rate and medication therapeutic rate of hypertension and diabetes. Differences of prevalence and therapeutic rates in gender and age were analyzed, and odds ratio (OR) and its 95% confidence interval (95%CI) in ordered multiple outcomes Logistic regression analysis were used to evaluate the correlations between differences of gender, age, geographic region and hypertension complicated with diabetes.

  Results  A total of 15 874 participants were selected, with an average age of (85.46±11.70) years, and 43.62% participants were male. Prevalence rates of hypertension, diabetes and hypertension complicated with diabetes were 42.93% (95%CI was from 42.13% to 43.74%), 10.14% (95%CI was from 9.64% to 10.64%) and 7.49% (95%CI was from 7.05% to 7.92%), respectively. Prevalence rates of hypertension and diabetes in female were significantly higher than those in male (P < 0.05). Missing rate of medication information for hypertension was higher than 30%, and missing rate of medication information for diabetes was higher than 50%. Prevalence rates of hypertension and diabetes decreased significantly with increasing of age (P < 0.05).Prevalence rates of hypertension and diabetes in people aged over 100 years were 25.91% (95%CI was from 23.88% to 27.93%) and 2.14% (95%CI was from 1.45% to 2.82%), respectively. Ordinal three-outcome Logistic regression analysis showed that male, aged over 90 years, living in northern part of China were protective factors for hypertension complicated with diabetes in senile people (P < 0.05).

  Conclusion  There are differences in gender in the distributions of hypertension and diabetes in senile people. Prevalence rates of hypertension and diabetes decrease with increasing of age, and hypertension complicated with diabetes are associated with gender, age and geographic region.