| Covariate (reference) | Level | Hazard Ratio | Std. Err | z | P > z | 95% Conf. Int. |
|---|---|---|---|---|---|---|
| Age (Under 20 years old) | 20 to 34 years old | 0.277 | 0.997 | -3.570 | p < 0.001 | [0.137; 0.560] |
| 35 years old and above | 0.395 | 0.157 | -2.330 | 0.020 | [0.181; 0.863] | |
| Residence (Rural) | Urban | 0.847 | 0.139 | -1.020 | 0.309 | [0.614; 1.167] |
| Antecedents (Not 1st newborn) | 1st new born | 0.806 | 0.157 | -1.100 | 0.270 | [0.550; 1.182] |
| Abortion (Not aborted) | Aborted once | 1.405 | 0.398 | 1.200 | 0.231 | [0.806; 2.448] |
| Aborted more than once | 0.479 | 0.161 | -2.190 | 0.028 | [0.248; 0.925] | |
| Childbirth (Ventouse) | Natural | 0.873 | 0.491 | -0.240 | 0.808 | [0.290; 2.627] |
| Surgery | 1.115 | 0.613 | 0.200 | 0.843 | [0.380; 3.274] | |
| Gender (Female) | Male | 1.740 | 0.296 | 3.260 | 0.001 | [1.247; 2.429] |
| Number (Singleton) | Multiple | 0.409 | 0.131 | -2.790 | 0.005 | [0.218; 0.766] |
| APGAR (Below 4/10) | 4/10 to 6/10 | 0.377 | 0.112 | -3.300 | 0.001 | [0.211; 0.673] |
| 7/10 and above | 0.130 | 0.036 | -7.460 | p < 0.001 | [0.076; 0.222] | |
| Weight (Under 2500 g) | 2500 g to 4500 g | 0.250 | 0.068 | -5.070 | p < 0.001 | [0.146; 0.427] |
| Above 4500 g | 0.442 | 0.285 | -1.270 | 0.206 | [0.125; 1.565] | |
| Head (Below 32 cm) | 32 cm to 36 cm | 0.456 | 0.128 | -2.800 | 0.005 | [0.263; 0.789] |
| Above 36 cm | 0.290 | 0.219 | -1.640 | 0.102 | [0.066; 1.278] | |
| Height (Below 46 cm) | 46 cm to 54 cm | 0.894 | 0.276 | -0.360 | 0.716 | [0.488; 1.637] |
| Above 54 cm | 1.670 | 1.264 | 0.680 | 0.498 | [0.379; 7.361] |