The aim of this study was to explore the influence of eating behaviors and sleep status on body mass index (BMI). Study subjects were 143 female college students (aged 19.9 ± 1.7years) and their parents, 93 fathers (aged 52 . 3 ± 4 . 8 years) and 119 mothers (aged 49 . 5 ± 4 . 0 years). The survey was performed using questionnaire forms, which included physical states, subjective symptoms related to sleep, degree of daytime sleepiness, eating behaviors, exercise habits and smoking. The pass analysis demonstrated that in the women students, any associations of eating behaviors and sleep states with BMI were not observed. In their parents, by contrast, the sleep states and eating behaviors had been shown to associate mutually, thereby related to BMI. It was suggested that the sleep state and dietary behavior influenced BMI in the group of the middle-aged.
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