Variable | Early-onset | Late-onset | ||||
---|---|---|---|---|---|---|
RR | (95% CI) | P | RR | (95% CI) | P | |
Neonate-related factors | ||||||
Low birth weight (≤2500 g) | 0.91 | 0.63-1.32 | 0.642 | 1.34 | 0.74-2.42 | 0.326 |
Prematurity (≤37 wks) | 2.19 | 1.41-3.40 | <0.0001 | 1.35 | 0.57-3.18 | 0.487 |
Product of multiple pregnancy | 1.13 | 0.64-1.98 | 0.669 | 2.5 | 1.14-4.80 | 0.019 |
Abnormal amniotic fluid | 1.67 | 1.25-2.23 | 0.007 | ---- | ----- | ---- |
Abnormal umbilical cord | 1.21 | 0.89-1.63 | 0.207 | 1.15 | 0.69-1.92 | 0.584 |
Perinatal asphyxia | 0.78 | 0.26-2.32 | 0.656 | 5.15 | 1.92-13.83 | 0.001 |
Maternal-related factors | ||||||
PMR ≥24 h¥ | 3.38 | 1.80-6.32 | <0.0001 | 2.71 | 0.48-15.30 | 0.258 |
Abnormal placenta | 1.71 | 1.16-2.53 | 0.007 | 1.17 | 0.94-3.22 | 0.078 |
Medical-care and hospital-evolution derived factors | ||||||
Mechanical ventilation | 1.00 | 0.90-1.12 | 0.863 | 2.71 | 1.56-4.69 | <0.0001 |
O2 inspiration fraction >60% | 3.21 | 1.95-5.28 | <0.0001 | 2.85 | 1.57-5.15 | 0.001 |
Continuous positive airway pressure | 0.87 | 0.29-2.60 | 0.804 | 3.66 | 1.30-10.27 | 0.013 |
Respiratory complication | 42.48 | 25.53-70.67 | <0.0001 | 16.36 | 3.39-78.91 | <0.0001 |
Surgical procedure required | 2.98 | 0.62-4.37 | 0.173 | 28.97 | 6.99-120.01 | <0.0001 |
Invasive medical procedure required | 3.01 | 2.13-4.26 | <0.0001 | 12.5 | 6.37-24.56 | <0.0001 |