Fig. 2

Comparison of prevalence of osteoporosis among groups according to education level. a, The results of comparison of prevalence of osteoporosis among groups according to Model 1 (education level were categorized by group 1: primary school, group 2: junior high school, group 3: senior high school, and group 4: college). The prevalence of osteoporosis was 17.86, 7.92, 6.35 and 9.03 % in the four groups, respectively. There were significantly differences among the four groups (P value = 0.003). b, The results of comparison of prevalence of osteoporosis among groups according to Model 2 (education level were categorized by group 1: low education level - primary school and junior high school, and group 2: high education level - senior high school and college). The prevalence of osteoporosis was 10.25 % and 7.65 % in the two groups, respectively. There were significantly differences between the two groups (P value = 0.133). c, The results of comparison of prevalence of osteoporosis between groups according to Model 3 (education level were categorized by group 1: primary school, and group 2: high school and college). The prevalence of osteoporosis was 17.86 % and 7.76 % between the two groups, respectively. There were significantly differences between the two groups (P value = 0.001)