Table 3.
Multiple logistic regression analysis of the clinical factors associated with mortality stratified by gestational age group.
| GROUP 1 | GA 23–24 W | p-value | GA 25–26 W | p-value | Total | p-value |
|---|---|---|---|---|---|---|
| Adjusted OR (95% CI) | Adjusted OR (95% CI) | Adjusted OR (95% CI) | ||||
| Gestational age (weeks) | 0.830 (0.519–1.329) | 0.438 | 0.985 (0.647–1.499) | 0.942 | 0.801 (0.662–0.970) | 0.023 |
| Birth weight (per 100 g) | 0.751 (0.592–0.952) | 0.018 | 0.841 (0.724–0.978) | 0.024 | 0.805 (0.710–0.912) | 0.001 |
| Apgar score, 5 min | 0.959 (0.850–1.081) | 0.489 | 0.804 (0.711–0.908) | <0.001 | 0.876 (0.805–0.954) | 0.002 |
| Body temperature | 0.780 (0.604–1.008) | 0.057 | 0.752 (0.536–1.055) | 0.099 | 0.770 (0.629–0.944) | 0.012 |
| Antenatal steroid use | 0.548 (0.303–0.992) | 0.047 | 0.879 (0.484–1.595) | 0.671 | 0.702 (0.466–1.056) | 0.089 |
| Caesarean section | 0.721 (0.450–1.154) | 0.173 | 0.834 (0.504–1.380) | 0.480 | 0.757 (0.540–1.062) | 0.107 |
| Chorioamnionitis | 0.893 (0.559–1.426) | 0.635 | 0.599 (0.373–0.959) | 0.033 | 0.750 (0.541–1.038) | 0.083 |
| GROUP 2 | GA 23–24 W | p -value | GA 25–26 W | p -value | Total | p -value |
| Gestational age (weeks) | 0.392 (0.216–0.711) | 0.002 | 0.625 (0.450–0.867) | 0.005 | 0.535 (0.446–0.643) | <0.001 |
| Birth weight (per 100 g) | 0.677 (0.501–0.914) | 0.011 | 0.772 (0.679–0.877) | <0.001 | 0.757 (0.673–0.851) | <0.001 |
| Apgar score, 5 min | 1.015 (0.874–1.178) | 0.848 | 0.984 (0.894–1.083) | 0.737 | 0.988 (0.913–1.070) | 0.769 |
| Body temperature | 0.926 (0.663–1.293) | 0.651 | 0.961 (0.732–1.260) | 0.772 | 0.936 (0.761–1.152) | 0.535 |
| Antenatal steroid use | 1.168 (0.634–2.151) | 0.618 | 0.750 (0.490–1.149) | 0.186 | 0.850 (0.599–1.206) | 0.362 |
| Caesarean section | 1.276 (0.727–2.238) | 0.396 | 1.251 (0.816–1.919) | 0.304 | 1.247 (0.891–1.746) | 0.198 |
| Chorioamnionitis | 0.942 (0.543–1.636) | 0.833 | 0.675 (0.463–0.985) | 0.041 | 0.743 (0.547–1.008) | 0.057 |
| TOTAL | GA 23–24 W | p -value | GA 25–26 W | p -value | Total | p -value |
| Gestational age (weeks) | 0.661 (0.471–0.927) | 0.016 | 0.777 (0.605–0.999) | 0.049 | 0.682 (0.602–0.773) | <0.001 |
| Birth weight (per 100 g) | 0.757 (0.637–0.901) | 0.002 | 0.827 (0.753–0.908) | <0.001 | 0.807 (0.743–0.876) | <0.001 |
| Apgar score, 5 min | 0.967 (0.888–1.054) | 0.449 | 0.904 (0.841–0.973) | 0.007 | 0.929 (0.878–0.982) | 0.009 |
| Body temperature | 0.841 (0.693–1.019) | 0.077 | 0.831 (0.676–1.021) | 0.077 | 0.835 (0.726–0.961) | 0.012 |
| Antenatal steroid use | 0.609 (0.409–0.906) | 0.015 | 0.789 (0.564–1.103) | 0.166 | 0.704 (0.547–0.906) | 0.007 |
| Caesarean section | 1.011 (0.722–1.415) | 0.951 | 1.108 (0.805–1.524) | 0.529 | 1.045 (0.831–1.313) | 0.708 |
| Chorioamnionitis | 0.687 (0.497–0.948) | 0.022 | 0.604 (0.454–0.804) | 0.001 | 0.639 (0.517–0.790) | <0.001 |
CI, confidence interval; GA, gestational age; OR, odds ratio; W, weeks.