Table 4.
The log-rank test estimate and the mean survival time among the covariates of the perinates delivered from the non-exposed groups
| Variable | Category | Mean survival time(95%CI) |
Log rank test estimate |
| Parity | Primigravida | 30.74(30.22,31.25) | X2=7.338, P-value=0.026 |
| Multipara(I-IV) | 33.75(33.41,34.09) | ||
| Grand multipara(V+) |
19.04(17.76,20.32) | ||
| Gestational Age | ≤34 | 10.71(8.67,12.75) | X2=9.025, P-value=0.011 |
| 35–36 | 13.34(12.21,14.47) | ||
| ≥37 | 13.86(13.11,14.61) | ||
| Number of ANC visits | One | 6.51(4.92,8.10) | X2=23.985, P-value=0.0001 |
| Two | 9.40(8.34,10.46) | ||
| Three | 12.72(11.75,13.68) | ||
| Four and above | 17.00(16.31,17.69) | ||
| Birth weight | <2500 | 12.79(10.77,14.82) | X2=44.31, P-value=0.0001 |
| ≥2500 | 13.33(12.69,13.97) | ||
| Mode of delivery | Vaginal | 13.16(12.54,13.79) | X2=38.01, P-value=0.0001 |
| Cesarean section | 14.78(12.11,17.44) |