Cho GJ, Hwang SY, Lee KM, et al. - In this nationwide population-based study, researchers explored whether a positive association exists between waist circumference (WC) and dementia in older people. The study sample consisted of 872,082 participants (aged ≥ 65 years and older) from the Korean national health screening examination between January 1, 2009, and December 31, 2009. Based on baseline BMI and WC categories, adjusted HRs and 95% CIs for dementia during follow-up from 2009 to 2015 were calculated. The HRs for dementia revealed a stepwise increase according to the increase in WC categories by 5 cm from 85 to 90 cm in men and from 80 to 85 cm in women until ≥ 110 cm after a multivariate adjustment that included BMI. Abdominal obesity, as measured by WC, was linked to significantly increased dementia risk after adjustment for general obesity.