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Data was presented as mean±standard deviation for age and frequency (percentage, %) for the others.
P-values were obtained from Kruskal-Wallis test for age and chi-square test for the others.
Bonferroni's post hoc comparison: i-j means that there exists the significant difference between the i-th group and the j-th group. (i, j=1,2,3; group 1= normal; group 2=osteopenia; group 3=osteoporosis).
