Medians and inter-quarter ranges of physical fitness performance were compared between flatfoot and non-flatfoot children after stratifying age and sex.

at-test. bMann-Whitney U Test. Medians and inter-quarter ranges of physical fitness performance were compared between flatfoot and non-flatfoot children after stratifying age and sex.t检验。 曼-惠特尼U检验（Mann-Whitney U Test）。 按年龄与性别分层后，比较扁平足儿童与非扁平足儿童的体能表现中位数及四分位距。