Miyamura K, Nawa N, Isumi A, et al. - Researchers intended to determine if there is an association between passive smoking and dyslipidemia in boys and girls during adolescence in Japan. They used a cross-sectional data of junior high school students in the Adachi Child Health Impact of Living Difficulty (A-CHILD) study in Adachi City, Tokyo, Japan in 2016 and 2018. The connection between passive smoking and dyslipidemia was assessed by using multivariate regression analyses adjusted for socioeconomic status and lifestyle factors stratified by boys (N = 564) and girls (N = 602). Findings suggested an association of exposure to passive smoking with HDL-C level among boys in Japan, but not in girls. To confirm the link between passive smoking and dyslipidemia among boys in Japan, a further longitudinal study is required.