Risk factors of nocturia (two or more voids per night) in Chinese people older than 40 years

AIMS: To explore the risk factors of nocturia in Chinese inhabitants aged >/=40 years. METHODS: A randomized, community-based, cross-sectional study was performed on 10,160 inhabitants >/=40 years old in mainland China, via a stratified sampling approach. A questionnaire, including socio-demographics, lifestyle factors and medical history, was completed. Nocturia was defined as a threshold of two or more voids per night. Differences in prevalence between age and gender groups were ascertained by the chi-squared test. Gender-related factors were evaluated by multivariate logistic regression analysis. P /=40 years, nocturia is associated with aging, OABSS, cardiovascular disease, hypertension, and DM. Sporting activities are negatively associated with nocturia.