Table 2 Results of the univariate survival analysis
Variable | Quartiles | Corrected P value | Coefficient | Exponentiated Coefficient (95% CI) | Risk change for 75% Quartile | ||||
|---|---|---|---|---|---|---|---|---|---|
0% | 25% | 50% | 75% | 100% | |||||
Gestation (days) | 161 | 184 | 198 | 211 | 223 | 0.002 | 0.026 | 1.026 (1.013–1.040) | 3.688 |
Birth weight (g) | 500 | 800 | 1025 | 1325 | 1890 | < 0.001 | 0.001 | 1.001 (1.001–1.002) | 2.788 |
Days of mechanical ventilation | 0 | 0 | 1 | 2 | 84 | 0.021 | −0.076 | 0.927 (0.885–0.971) | 0.860 |
Days of CPAP oxygen | 0 | 0 | 2 | 12 | 80 | < 0.001 | −0.039 | 0.962 (0.947–0.977) | 0.626 |
Days of maternal milk feeds (non-breast) | 0 | 6 | 14 | 29 | 114 | < 0.001 | −0.057 | 0.945 (0.930–0.959) | 0.192 |
Days of breast feeds | 0 | 0 | 0 | 3 | 48 | 0.001 | −0.073 | 0.929 (0.896–0.964) | 0.802 |
Days of antibiotic use | 0 | 2 | 3 | 6 | 79 | < 0.001 | −0.116 | 0.89 (0.848–0.934) | 0.497 |