Table 4.
Variable | Status | CHR (95%CI) | AHR (95%CI) | |
Event | Censored | |||
Sex | ||||
Male | 95 | 123 | 0.78 (0.59 to 1.03) | 0.82 (0.61 to 1.10) |
Female | 98 | 89 | 1 | 1 |
Mode of delivery | ||||
Instrumental assisted | 6 | 10 | 0.50 (0.22 to 1.13) | 0.48 (0.205 to 1.32) |
CS | 35 | 53 | 0.60 (0.42 to 0.87) | 0.62 (0.41 to 0.93)** |
SVD | 152 | 149 | 1 | |
Type of pregnancy | ||||
Multiple | 60 | 41 | 1.50 (1.10 to 2.04) | 1.43 (1.04 to 1.96)** |
Single | 133 | 171 | 1 | |
Pre-eclampsia | ||||
Yes | 52 | 51 | 1.17 (0.85 1.61) | 1.14 (0.80 to 1.62) |
No | 141 | 161 | 1 | 1 |
PNA | ||||
Yes | 28 | 28 | 1.24 (0.83 to 1.85) | 1.26 (0.82 to 1.94) |
No | 165 | 184 | 1 | 1 |
NEC | ||||
Yes | 10 | 7 | 1.44 (0.76 to 2.72) | 1.40 (0.73 to 2.69) |
No | 183 | 205 | 1 | 1 |
IUGR | ||||
Yes | 5 | 13 | 0.39 (0.14 to 1.03) | 0.67 (0.24 to 186) |
No | 188 | 199 | 1 | 1 |
First-minute APGAR score | ||||
˂7 | 85 | 68 | 1.48 (1.11 to 1.97) | 1.08 (0.77 to 1.51) |
≥7 | 108 | 144 | 1 | 1 |
Fifth-minute APGAR score | ||||
˂7 | 32 | 14 | 1.94 (1.33 to 2.83) | 1.86 (1.18 to 2.92)*** |
≥7 | 161 | 198 | 1 | 1 |
Gestational age in weeks | ||||
<37 | 156 | 123 | 2.09 (1.43 to 3.05) | 1.56 (1.06 to 2.30)** |
≥37 | 37 | 89 | 1 | 1 |
Birth weight | ||||
≤999 | 15 | 6 | 3.52 (2.11 to 5.86) | 3.14 (1.81 to 5.40)*** |
1000–1499 | 60 | 24 | 2.43 (1.78 to 3.33) | 2.06 (1.42 to 2.83)** |
1500–2499 | 118 | 182 | 1 | 1 |
**=Statistically significant variables with p-value <0.01, & ***p<0.001.
1, reference; AHR, Adjusted Hazard Ratio; APGAR, Appearance, Pulse, Grimace, Activity, Respiration; CHR, Crude Hazard Ratio; CS, caesarean section; IUGR, intrauterine growth restriction; NEC, necrotising entero colitis; PNA, perinatal asphyxia; SVD, spontaneous vaginal delivery.