Table 3.
Multivariate Logistic Regression Analysis of High-Risk Factors
| OR | 95% CI | P value | |
|---|---|---|---|
| Age group (years) | |||
| 20–29 (ref.) | |||
| 30–39 | 1.390 | 1.094–1.767 | 0.007 |
| 40–49 | 1.489 | 1.171–1.894 | 0.001 |
| 50–59 | 1.536 | 1.163–2.028 | 0.003 |
| 60–70 | 2.331 | 1.699–3.198 | < 0.001 |
| Body mass index (kg/m2) | |||
| Underweight (<18.5) | 0.662 | 0.564–0.777 | < 0.001 |
| Normal (18.5–23.9)(ref.) | |||
| Overweight (24–27.9) | 1.183 | 1.053–1.329 | 0.005 |
| Obese (≥28) | 1.335 | 1.114–1.599 | 0.002 |
| Menopause | 1.580 | 1.322–1.888 | < 0.001 |
| Residence | |||
| Rural (ref.) | |||
| Urban | 1.670 | 1.499–1.861 | < 0.001 |
| Educational status | |||
| Primary school or below (ref.) | |||
| Junior high school | 0.735 | 0.644–0.839 | < 0.001 |
| Senior high | 0.960 | 0.818–1.128 | 0.623 |
| College graduate or higher | 0.727 | 0.591–0.896 | 0.003 |
| Personal monthly income | |||
| <149 (ref.) | |||
| 149–448 | 0.902 | 0.794–1.025 | 0.114 |
| 448–746 | 0.956 | 0.828–1.105 | 0.546 |
| 746–1493 | 0.764 | 0.618–0.944 | 0.013 |
| ≥1493 | 0.807 | 0.518–1.257 | 0.343 |
| Number of vaginal delivery | |||
| 0 (ref.) | |||
| 1–2 | 2.298 | 1.766–2.989 | < 0.001 |
| ≥3 | 2.990 | 2.285–3.913 | < 0.001 |
| Prior delivery of macrosomia | 2.270 | 1.718–2.998 | < 0.001 |
| Instrumental vaginal delivery | 1.751 | 1.384–2.215 | < 0.001 |
| Previous pelvic floor surgery | 2.033 | 1.457–2.835 | < 0.001 |