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논문 기본 정보

자료유형
학술저널
저자정보
저널정보
대한지역사회영양학회 대한지역사회영양학회지 대한지역사회영양학회지 제10권 제2호
발행연도
2005.4
수록면
196 - 204 (9page)

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Menarche is main indicator of sexual maturity which relates to a reproductive function. The onset of the menstrual cycle differs individually and is influenced by many variables such as socio-economic situation, race, genetics, climate, altitude, nutritional status, and physical growth. Among them physical growth has been known to be the most influencing factor, particularly when expressed as body fat designated by weight. This study intended to investigate the body composition of girls around the menarche period and to evaluate the minimal levels of weight and fat percentage needed for the onset of menarche. A total of 101 female subjects, aged 11 to 13 years, were recruited from the 5th and 6th grades of an elementary school, in Mokpo, Korea. The subjects were placed into one of two groups Pre-menarche and Post-menarche groups according to their experience with menarche. Thereafter, the subjects in the Post-group were placed into 4 subgroups based on the number of menstruations they experienced : Post-Ⅰ(1-3 times), Post-Ⅱ(4-6 times), Post-Ⅲ(7-9 times), and Post-Ⅳ(>10 times). The average age at the onset menarche of the subjects in Post groups was 11.2±0.6 years. There were significant differences in the data of anthropometry and body composition between the Pre and Post groups, although the mean ages of both Pre and Post groups were the same. Weight, waist, hip and thigh girths, fat percentage, and lean body mass of the Post groups were significantly higher than those of the Pre group. Height was not significantly different between the groups. Weight was highly correlated with body fat mass (r=0.92, p<0.001), fat percentage (r=0.85, p<0.001), and body mass index (r=0.91, p<0.001). These results indicate that weight, compared with height, reflects body composition well and influences the onset of the menstrual cycle. It could also by suggested that the minimal weight and fat percentage needed for the onset of menarche in Korean females are 41㎏ and 17% to 19%, respectively.

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