| Covariate (reference) | Level | Hazard Ratio | Std. Err. | z | P > z | 95% Conf. Int. |
|---|---|---|---|---|---|---|
| Age (Under 20 years old) | 20 to 34 years old | 0.193 | 0.085 | -3.730 | p < 0.001 | [0.081; 0.458] |
| 35 years old and above | 0.267 | 0.128 | -2.760 | 0.006 | [0.104; 0.682] | |
| Residence (Rural) | Urban | 0.766 | 0.150 | -1.360 | 0.175 | [0.521; 1.126] |
| Antecedents (Not 1st newborn) | 1st newborn | 0.763 | 0.185 | -1.120 | 0.264 | [0.475; 1.226] |
| Abortion (Not aborted) | Aborted once | 1.404 | 0.453 | 1.050 | 0.293 | [0.746; 2.643] |
| Aborted more than once | 0.378 | 0.152 | -2.420 | 0.015 | [0.172; 0.830] | |
| Childbirth (Ventouse) | Natural | 0.732 | 0.481 | -0.470 | 0.635 | [0.202; 2.653] |
| Surgery | 1.016 | 0.654 | 0.030 | 0.980 | [0.288; 3.590] | |
| Gender (Female) | Male | 1.991 | 0.405 | 3.390 | 0.001 | [1.336; 2.966] |
| Number (Singleton) | Multiple | 0.218 | 0.111 | -3.000 | 0.003 | [0.080; 0.589] |
| APGAR (Below 4/10) | 4/10 to 6/10 | 0.080 | 0.042 | -4.810 | p < 0.001 | [0.029; 0.224] |
| 7/10 and above | 0.021 | 0.011 | -7.840 | p < 0.001 | [0.008; 0.056] | |
| Weight (Under 2500 g) | 2500 g to 4500 g | 0.236 | 0.070 | -4.850 | p < 0.001 | [0.131; 0.423] |
| Above 4500 g | 0.378 | 0.257 | -1.430 | 0.153 | [0.100; 1.436] | |
| Head (Below 32 cm) | 32 cm to 36 cm | 0.391 | 0.119 | -3.100 | 0.002 | [0.216; 0.708] |
| Above 36 cm | 0.212 | 0.171 | -1.920 | 0.055 | [0.043; 1.033] | |
| Height (Below 46 cm) | 46 cm to 54 cm | 0.828 | 0.283 | -0.550 | 0.582 | [0.423; 1.620] |
| Above 54 cm | 1.706 | 1.351 | 0.670 | 0.500 | [0.361; 8.060] |