Outcome measures split by gestational age at birth
| Measure | Gestation at birth | ||||||||
| 37 (n=170 425) | 38 (n=457 616) | 39 (n=811 180) | 40 (n=1 014 799) | 41 (n=669 818) | 42 (n=264 171) | 43 (n=32 728) | 44 (n=5215) | 45 (n=1498) | |
| Apgar score | |||||||||
| 1 min | 8.66 (8.64 to 8.66) | 8.79 (8.79 to 8.80) | 8.78 (8.80 to 8.80) | 8.75 (8.75 to 8.76) | 8.66 (8.65 to 8.66) | 8.53 (8.53 to 8.54) | 8.53 (8.51 to 8.56) | 8.69 (8.64 to 8.75) | 8.75 (8.63 to 8.86) |
| 5 min | 9.59 (9.59 to 9.60) | 9.68 (9.68 to 9.69) | 9.69 (9.69 to 9.69) | 9.67 (9.67 to 9.67) | 9.62 (9.62 to 9.62) | 9.54 (9.53 to 9.54) | 9.43 (9.42 to 9.45) | 9.40 (9.36 to 9.44) | 9.44 (9.38 to 9.52) |
| 10 min | 9.82 (9.82 to 9.83) | 9.87 (9.87 to 9.88) | 9.88 (9.88 to 9.88) | 9.87 (9.87 to 9.87) | 9.84 (9.84 to 9.84) | 9.79 (9.79 to 9.80) | 9.70 (9.68 to 9.72) | 9.59 (9.51 to 9.67) | 9.53 (9.37 to 9.70) |
| Low (<7) Apgar score at 5 min | 2243 (1.4%) | 3755 (0.9%) | 6082 (0.8%) | 8153 (0.9%) | 6826 (1.1%) | 3616 (1.5%) | 549 (1.9%) | 81 (1.9%) | 18 (1.6%) |
| Encephalopathy | 324 (0.19%) | 624 (0.14%) | 902 (0.11%) | 1119 (0.12%) | 1019 (0.15%) | 551 (0.21%) | 60 (0.18%) | 9 (0.17%) | 1 (0.07%) |
All P values for trend are <0.001.
Values are number (%) or geometric mean (95% CI) as appropriate.