Kae Karasawa, Ryo Tanaka, Kazuma Maekado, Naoki Motozawa, Akira Watanabe, Naoko Yamada, Kosuke Tanabe, Akiko Shikano, Kohei Miura, Shingo Noi
A multivariate, binomial logistic regression analysis was conducted with sleep problems as the objective variable and sex, grade, and living conditions (sleep, breakfast intake, defecation, outdoor play, and media usage time) as explanatory variables. The results of this study detected significant odds ratios between sleep problems and any of the explanatory variables.