Confirmation regarding regression polynomial evaluation of age at menarche against age at MPV of weight

Abstract

Based on the regression evaluation of menarcheal age relative to the age at MPV of height, a delayed menarche evaluation chart was established. In fact, it is thought that the close relationship between menarche and body weight may lie behind the critical weight hypothesis and body fat hypothesis proposed in relation to the onset of menarche. In other words, the age at maximum peak velocity (MPV) in weight and age at menarche are thought to be highly correlated, so a regression evaluation chart for age at menarche against age at MPV of height can be constructed. Then, in the present study, a delayed menarche evaluation chart based on age at MPV of weight is constructed, and compared it with evaluations of delayed menarche determined by age at MPV of height. The results showed that the age at MPV of weight is later than the age of MPV in height. The level of agreement between girls judged using delayed menarche evaluation charts based on ages at MPV of height and weight was analyzed, and the results showed agreement in 131 of 204 girls (64.2%). The fact that there was disagreement in 74 girls (35.8%) indicates that the validity of delayed menarche evaluation based on age at MPV of weight is probably low.