Department of Applied Bioresource Science, The United Graduate School of Agricultural Sciences, Ehime University, 3-5-7 Tarumi, Matsuyama, Ehime 790-8566, Japan.
Environ Health Prev Med. 2013 Jul;18(4):313-22. doi: 10.1007/s12199-012-0322-6. Epub 2012 Dec 8.
The purpose of this study is to investigate factors influencing the osteo-sono assessment index (OSI) in junior high school students (boys, girls who had reached menarche, and girls who had not).
A total of 9,743 students (4,974 boys and 4,769 girls) in Ehime Prefecture participated in this study. We measured body mass index (BMI) and calcaneal bone mass using OSI. In parallel, participants answered a questionnaire relating to age, sex, menarche, exercise habits, milk intake, and history of bone fractures during the preceding year. To determine the factors influencing OSI, we calculated an individual standardized partial regression coefficient (β) using multiple linear regression (MLR) analysis.
For boys, MLR showed that BMI (β = 0.300), age (β = 0.260), current exercise habits (β = 0.106), and milk intake per day in primary school (β = 0.085) statistically significantly influenced OSI. For girls who had reached menarche, BMI (β = 0.302), current exercise habits (β = 0.237), age (β = 0.140), and bone fracture during the preceding year (β = 0.036) influenced OSI. For girls who had not reached menarche, current exercise habits (β = 0.242), BMI (β = 0.135), and age (β = 0.085) influenced OSI.
There were differences between the factors related to OSI among boys, girls who had reached menarche, and girls who had not. BMI, exercise habits, and age were the common factors related to OSI. Particularly for girls, exercise habits had a great influence on OSI.
本研究旨在探讨影响初中生（男、已初潮女和未初潮女）的骨-声评估指数（OSI）的因素。
本研究共纳入爱媛县 9743 名学生（男生 4974 名，女生 4769 名）。我们使用 OSI 测量体重指数（BMI）和跟骨骨量。同时，参与者回答了一份与年龄、性别、初潮、运动习惯、牛奶摄入量以及前一年骨折史相关的问卷。为了确定影响 OSI 的因素，我们使用多元线性回归（MLR）分析计算了个体标准化偏回归系数（β）。
对于男生，MLR 显示 BMI（β=0.300）、年龄（β=0.260）、当前运动习惯（β=0.106）和小学时每天的牛奶摄入量（β=0.085）对 OSI 有统计学显著影响。对于已初潮的女生，BMI（β=0.302）、当前运动习惯（β=0.237）、年龄（β=0.140）和前一年骨折（β=0.036）对 OSI 有影响。对于未初潮的女生，当前运动习惯（β=0.242）、BMI（β=0.135）和年龄（β=0.085）对 OSI 有影响。
男生、已初潮女和未初潮女的 OSI 相关因素存在差异。BMI、运动习惯和年龄是与 OSI 相关的共同因素。特别是对于女生，运动习惯对 OSI 有很大影响。
