APOA1 and osteoporosis: As shown in the multivariate logistic regression analysis in Tables 3 and 4, when ApoA1 was used as a continuous variable, it was significantly associated with osteoporosis in all three adjusted models [Model 1, 2 and 3, OR (95% CI), P value: 2.219 (1.316, 3.739), 0.003; 2.381 (1.404, 4.038), 0.001; 2.289 (1.350, 3.881), 0.002; respectively].