Lifestyle determinants of depressive feeling and a feeling of unhappiness among workers: A study in Japan

Abstract

Depressive state and/or a feeling of unhappiness were significantly associated with a reduced duration of sleep among the workers. Aging was a preventative factor of depressive state and/or a feeling of unhappiness. The effect of obesity was adjusted in this study, but the cause-effect relation between lifestyles and depressive state and/or a feeling of unhappiness should be clarified by the follow-up study.