Ito H, et al. – Researchers assessed data from 18,952 women enrolled in a multiphasic health screening to determine the association between body mass index (BMI), including low BMI, and nocturia in Japanese women. Overall, the prevalence of nocturia (≥ 2 voids/night) was 4.3% and it progressed in an age-dependent manner. In younger individuals, BMI did not affect nocturia. However, in women with high BMI who were in their 50s and 60s, the prevalence of nocturia was higher; for women aged > 80 years but with lower BMI, the prevalence was higher. An important correlation between nocturia and age, BMI, sleep disturbance, arteriosclerosis, cerebrovascular disease, chronic pulmonary disease, diabetes mellitus, and hypertension was noted. Both high BMI (which is already reported as a risk of nocturia) and low BMI were factors associated with nocturia.