Table 3.
US (N=379) | NZ (N=180) | |||
---|---|---|---|---|
N(%) or Mean (SD) | Exposed (N=183) | Comparison (N=196) | Exposed (N=85) | Comparison (N=95) |
Gestational age, week | 38.9 (1.5)* | 39.24 (1.4) | 39.2 (1.6) | 39.5 (1.3) |
Birth weight, g | 3278 (528) | 3378 (536) | 3380 (473) | 3474 (527) |
Length, cm | 50.3 (3.2)** | 51.3 (2.8) | 51.1 (2.2) | 51.1 (2.5) |
Head circumference, cm | 33.9 (0.6)* | 34.3 (1.7) | 34.7 (1.7) | 35.0 (1.7) |
Apgar, 1 min, <5,% | 8 (4%) | 2 (1%) | 0 | 3 (3%) |
Apgar, 5 min, <5,% | 0 | 0 | 0 | 0 |
Male, % | 98 (54%) | 104 (53%) | 43 (51%) | 50 (53%) |
First born, % | 43 (24%) | 76 (39%)** | 36 (43%) | 44 (46%) |
P <0.01, P <0.05