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。