Relationship between chronological changes of health checkup data and lifestyle factors in male university students:

To statistically clarify the effects of university life of male students on risk factors of lifestyle-related diseases, we analyzed the trends in health checkup/interview data of individual students over five years. The health checkup/interview data of 1779 male students entered the undergraduate program in one of the two faculties （Faculty of Engineering and Faculty of Informatics） in the Hamamatsu Campus of Shizuoka University in the fiscal year 2009-2014 and advanced to master’s program were analyzed. The results revealed that body mass index tended to increase very minutely with increasing grades in university. Body fat percentage exhibited a clear increasing trend both in variation according to grade and in cluster analysis using individual students’ longitudinal data. Variations in the eight items related to lifestyle （“Drinking,” “Smoking,” “Exercise,” “Supper time,” “Sleeping hours,” “Breakfast taking,” “TV/PC hours,” and “Part-time job”） of the interview data were analyzed according to the students’ grades. The results revealed that approximately half of the students had become night persons. Lastly, the relationships between the lifestyle factors （eight items in the interview data） versus increase/decrease in body weight and five items of blood test （ALT, γ-GTP, HDL-C, LDL-C, and uric acid） were analyzed using the quantification method of the first type. The results revealed 5% significant interpretability in all items except uric acid, suggesting that the lifestyle of the male students affected the risk factors of lifestyle-related diseases. In particular, “TV/PC hours” and “Exercise” were lifestyle items that had a significant affect.