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调查赣州市72名13岁有月经女生的身高、体重、胸围、肩宽四项形态指标,并与70名同校同月出生的无月经女生作对照,所得资料作多因素判别分析。结果显示,本组判别临界值Zo=0.346,有月经组的判别正确率为88.89%,无月经组为84.29%;已来月经女生的四项指标的平均值都高于同龄组无月经女生,其贡献率身高为39.14%,体重为33.9%,胸围为19.40%,肩宽为7.54%。表明少女在上述四项指标增加到临界值时,即有月经初潮发生的可能。
A total of 72 female students aged 13 years in Ganzhou City were investigated for their height, weight, bust and shoulder width. The data were compared with 70 non-menstruating girls born in the same school in the same month. The data were analyzed by multivariate discriminant analysis. The results showed that the discriminant cutoff Zo = 0.346 in this group, the discriminant correct rate in menstrual group was 88.89%, and the non-menstrual group was 84.29%. The average of the four indicators of the women who had come to menstruation was higher than those in the same age group, The contribution rate of 39.14% height, weight 33.9%, bust 19.40%, shoulder width 7.54%. Show girls in the above four indicators increased to the critical value, that is, the possibility of menarche.