Table 2.
Factors associated with preeclampsia.
| Variable | Crude OR | 95% CI | P | Adj. OR | 95% CI | P |
|---|---|---|---|---|---|---|
| Age groups | <0.001 | <0.001 | ||||
| ≥35 years old (Advance maternal age) | 1.796 | (1.515; 2.130) | <0.001b | 2.075 | (1.715; 2.511) | <0.001 |
| ≤19 years old (Teenage pregnancy) | 0.253 | (0.035; 1.809) | 0.171b | 0.214 | (0.030; 1.527) | 0.114 |
| 20–34 years Old | 1.000 | 1.000 | ||||
| Gravida classification | <0.001 | |||||
| Gravida 6 and more | 1.572 | (1.111; 2.223) | 0.011 | |||
| Gravida 1 | 1.460 | (1.241; 1.718) | <0.001 | |||
| Gravida 2–5 | 1.000 | |||||
| Parity classification | <0.001 | 0.001 | ||||
| Para 5 and more | 1.236 | (0.656; 2.331) | 0.512 | 0.876 | (0.458; 1.674) | 0.479 |
| Nulliparous | 1.506 | (1.287; 1.763) | <0.001 | 1.792 | (1.518; 2.115) | <0.001 |
| 1–4 | 1.000 | 1.000 | ||||
| Anemia | ||||||
| Yes | 0.261 | (0.173; 0.392) | <0.001 | 0.299 | (0.198; 0.450) | <0.001 |
| No | 1.000 | 1.000 | ||||
| Multiple pregnancy | ||||||
| Yes | 1.734 | (1.127; 2.667) | 0.021 | 1.658 | (1.071; 2.566) | 0.034 |
| No | 1.000 | 1.000 | ||||
| Diabetes mellitus | ||||||
| Yes | 3.525 | (1.960; 6.339) | <0.001 | |||
| No | 1.000 | |||||
| History of preeclampsia | ||||||
| Yes | 8.512 | (4.512; 16.058) | <0.001 | 5.345 | (2.670; 10.698) | <0.001 |
| No | 1.000 | 1.000 | ||||
| Gestational hypertension | ||||||
| Yes | 3.854 | (2.865; 5.184) | <0.001 | 3.482 | (2.575; 4.709) | <0.001 |
| No | 1.000 | 1.000 | ||||
| Chronic hypertension | ||||||
| Yes | 10.928 | (8.255; 14.46) | <0.001 | 8.999 | (6.719; 12.053) | <0.001 |
| No | 1.000 | 1.000 | ||||
| Age*chronic hypertension | 0.002 | |||||
| ≥35 years old* chronic hypertension | 0.390 | (0.217; 0.702) | 0.002 | |||
| Anemia*gestational hypertension | 7.716 | (2.764; 21.544) | 0.001 |
Final model using Forward Stepwise (Likelihood Ratio); Hosmer and Lemeshow Test 0.292; Nagelkerke R Square 6.4%; Classification table 98.4%. *Interaction between variables. bWald test. The bold value means significant (p < 0.05).