In Japan, child's sleep problems are worried about and its solutions are being searched for. In this situation, a hypothesis can be established by subjectively solving a difficult-to-realize problem if successfully measuring and visualizing melatonin which is considered as an important indicator for sleep. For that reason, the study purpose is to examine predictor variables of child's melatonin secretory pattern to search for utilizable alternative melatonin indicators in a future health education. The participants in this study were 50 children (26 boys and 24 girls) from 4th grade to 5th grade in an elementary school, and the data of 43 children (22 boys and 21 girls) who did not have the missing value were used for the analysis. Research was carried out only on weekdays in October 2016. The research was conducted only on weekdays in October 2016. The data of salivary melatonin level (night and morning) for each research subject was collected as bed time, wake-up time, the total number of steps in a day, axillary temperature (night and morning), and bar-gripping values (morning). The main results are as follows. 1) When making a comparison of salivary melatonin level for each research subject (morning and night), the study found 15.8％ for night＞morning (the N＞M group) and 42.1％ for night＜morning (the N＜M group). 2) The bed time was significantly late for the N＜M group (22 : 37±39.3) compared to the N＞M group (22 : 02±57.1) while the N＜M group (10,898.5±3,913.0 steps) was significantly smaller for the total number of steps in a day compared to the N＞M group (15,182.3±4,758.7 steps). 3) The study extracted bed time (β＝-0.452) and the total number of steps (β＝0.375) in a day as a significant predictor variables of melatonin secretory pattern by multiple regression analysis.
Based on the above-described facts, it is concluded that a future task will be a creation of health education on the basis of bed time and the total number of steps in a day.
