PDF(Pubmed)
Abstract：
Menarche is a significant pubertal event influencing girls\' participation in physical activity. As menarche is a sensitive matter, a non-invasive substitute is needed to help classify girls\' maturity status and provide physical literacy to them in this regard. The objective of this exploratory study was to investigate the classification agreement between self-reported age of menarche and calculated maturity offset in adolescent girls from South Africa by making use of various statistical methods. Fifty-eight girls, n = 13 pre- and n = 45 post-menarche (Status Quo method) aged 13.51 ± 3.51 years at baseline, were analyzed (2010-2012). Independent t-testing, cross-tabulation, Roc Curve statistics and logistic regression were used to analyze the classification agreement between markers. All four statistical methods revealed the potential to categorize different maturity groups through the maturity offset equation, although the accuracy declined with increased age. A realized power of 0.92 was found for the group in the first year of the study, with a gradual and significant decline over time. Cross-tabs showed a significant moderate predictive effectiveness (Chi-square = 0.042) during T1, closer to PHV (13.51 years) although also declining significantly with increased age (T2, 14.51 years) beyond PHV (Chi-square = 0.459). Although positive results were found, caution must be used when using maturity offset equations in different homogenic populations due to their unique growth characteristics.
摘要：
月经初潮是影响女孩参加体育活动的重要青春期事件。因为初潮是一个敏感的问题，需要一种非侵入性的替代品来帮助对女孩的成熟状态进行分类，并在这方面向她们提供身体素养。这项探索性研究的目的是通过使用各种统计方法，调查南非青春期女孩的月经初潮自我报告年龄与计算出的成熟度之间的分类协议。58个女孩,n=13前和n=45后初潮（现状方法）年龄13.51±3.51岁，基线，进行了分析(2010-2012)。独立t检验，交叉制表，使用Roc曲线统计和逻辑回归分析标志物之间的分类一致性。所有四种统计方法都揭示了通过期限偏移方程对不同期限组进行分类的潜力，尽管准确性随着年龄的增加而下降。在研究的第一年，该组的实现功率为0.92，随着时间的推移逐渐显著下降。在T1期间，交叉标签显示出显着的中等预测效果（卡方=0.042），更接近PHV（13.51年），尽管随着年龄的增加（T2，14.51年）超过PHV（卡方=0.459），也显着下降。尽管发现了积极的结果，由于其独特的生长特性，在不同的同质种群中使用成熟度偏移方程时必须谨慎。
