Kyohei Kiyota, Akiko Takemoto, Saori Okajima, Shizuka Morino, Satoru Kakoi, Junko Sakuma, Masato Yoshimitsu, Kazuhiko Akutsu, Keiji Kajimura
[A Survey of School Lunch Provision for Elementary School Students with Food Allergy in Seven Cities of Osaka Prefecture]
Shokuhin eiseigaku zasshi. Journal of the Food Hygienic Society of Japan
understand status correlative factors menarche first spermatorrhea among children adolescents chongqing order provide theoretical basis carrying sex health education population random stratified cluster sampling 10 498 students 5 372 boys 5 126 girls 5 18 years old living chongqing urban districts enrolled general situation physical features population studied statistics analysis system included logistic regression methods ttest chisquare test urban kids first experience spermatorrhea 0218 years later living rural areas z73287p0001 median age girls urban areas 0073 years earlier rural areas z71589p0001 except factor mothers education level family 221564 p0001 family environment related factors show significant difference two groups boys p005 however significant difference appeared average family income 26175p0046 two groups girls data logistic analysis showed bmi hip circumference height weight number children family time sleep diet structure associated menarche correlative factors boys first spermatorrhea would include highenergy snacks hip circumference weight height school type mother education level p005 first spermatorrhea menstruation boys girls closely related environment family diet time sleep