Table 2.
Forward stepwise logistic regression models.
| Covariates | Model 1: full model | Model 2 | Model 3 | Model 4 | Model 5 | Model 6 | Model 7 | Model 8: final model | ||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| OR | 95% CI | p Value | OR | 95% CI | p Value | OR | 95% CI | p Value | OR | 95% CI | p Value | OR | 95% CI | p Value | OR | 95% CI | p Value | OR | 95% CI | p Value | OR | 95% CI | p Value | |
| Age | 0.89 | 0.81–0.97 | 0.008 | 0.89 | 0.81–0.97 | 0.008 | 0.89 | 0.81–0.97 | 0.008 | 0.89 | 0.81–0.97 | 0.008 | 0.89 | 0.81–0.97 | 0.006 | 0.89 | 0.81–0.97 | 0.006 | 0.88 | 0.81–0.96 | 0.005 | 0.88 | 0.80–0.95 | 0.002 |
| Years of schooling | 1.20 | 1.02–1.43 | 0.033 | 1.21 | 1.02–1.43 | 0.032 | 1.20 | 1.02–1.43 | 0.032 | 1.20 | 1.02–1.43 | 0.032 | 1.19 | 1.01–1.41 | 0.038 | 1.20 | 1.01–1.41 | 0.036 | 1.19 | 1.01–1.40 | 0.041 | 1.19 | 1.00–1.41 | 0.047 |
| The presence or absence of mental disease | 2.19 | 0.90–5.30 | 0.083 | 2.19 | 0.90–5.30 | 0.083 | 2.18 | 0.90–5.28 | 0.083 | 2.19 | 0.91–5.29 | 0.082 | 2.27 | 0.95–5.43 | 0.065 | 2.36 | 0.99–5.61 | 0.053 | 2.44 | 1.03–5.79 | 0.043 | 2.39 | 1.00–5.70 | 0.049 |
| A history of MDD | 2.26 | 1.01–5.08 | 0.048 | 2.25 | 1.01–5.04 | 0.048 | 2.26 | 1.01–5.05 | 0.046 | 2.26 | 1.01–5.05 | < 0.001 | 2.24 | 1.01–4.98 | 0.048 | 2.22 | 1.00–4.93 | 0.049 | 2.22 | 1.00–4.92 | 0.049 | 2.16 | 1.00–4.79 | 0.049 |
| Quality of social support | 0.75 | 0.58–0.99 | 0.041 | 0.75 | 0.58–0.99 | 0.040 | 0.75 | 0.58–0.98 | 0.037 | 0.75 | 0.57–0.97 | 0.028 | 0.75 | 0.57–0.97 | 0.028 | 0.75 | 0.58–0.97 | 0.028 | 0.74 | 0.57–0.96 | 0.025 | 0.77 | 0.60–0.99 | 0.041 |
| EPDS total point in the pregnancy period | 1.25 | 1.15–1.35 | < 0.00 | 1.25 | 1.15–1.35 | < 0.000 | 1.25 | 1.15–1.35 | < 0.000 | 1.25 | 1.16–1.35 | < 0.000 | 1.26 | 1.17–1.36 | < 0.000 | 1.26 | 1.17–1.36 | < 0.000 | 1.26 | 1.17–1.36 | < 0.000 | 1.25 | 1.16–1.34 | < 0.000 |
| Number of childbirths | 0.57 | 0.23–1.39 | 0.216 | 0.58 | 0.24–1.38 | 0.216 | 0.58 | 0.24–1.39 | 0.219 | 0.58 | 0.24–1.39 | 0.221 | 0.55 | 0.23–1.30 | 0.172 | 0.55 | 0.23–1.30 | 0.173 | 0.55 | 0.23–1.31 | 0.178 | |||
| Drinking habits | 1.65 | 0.49–5.58 | 0.420 | 1.63 | 0.49–5.38 | 0.425 | 1.63 | 0.49–5.40 | 0.421 | 1.66 | 0.51–5.47 | 0.403 | 1.90 | 0.63–5.78 | 0.257 | 1.93 | 0.63–5.87 | 0.247 | ||||||
| Hospital types | 1.19 | 0.74–1.93 | 0.479 | 1.19 | 0.74–1.91 | 0.485 | 1.19 | 0.74–1.91 | 0.471 | 1.20 | 0.74–1.91 | 0.462 | 1.20 | 0.75–1.93 | 0.445 | |||||||||
| Smoking habits | 1.77 | 0.37–8.55 | 0.475 | 1.80 | 0.38–8.51 | 0.458 | 1.78 | 0.38–8.34 | 0.464 | 1.74 | 0.37–8.19 | 0.481 | ||||||||||||
| Amount of social support | 0.97 | 0.79–1.20 | 0.781 | 0.97 | 0.79–1.20 | 0.768 | 0.97 | 0.79–1.20 | 0.767 | |||||||||||||||
| MIBQ total points in the pregnancy period | 1.01 | 0.92–1.11 | 0.863 | 1.01 | 0.91–1.11 | 0.866 | ||||||||||||||||||
| The presence or absence of physical disease | 0.95 | 0.44–2.01 | 0.904 | |||||||||||||||||||||
EPDS, Edinburgh Postnatal Depression Scale; MDD, major depressive disorder.