Included | Excluded* | ||
---|---|---|---|
Denominator, N | 62,747 | maximum 41,146 | |
Sex | p | ||
Male fetus, % (N) | 50.62 (31,760) | 51.63 (21,242) | 0.0014 |
Gestational age | |||
Mean GA (sd), wks | 39.0 (1.6) | 38.2 (2.6) | <.0001 |
GA<37 weeks, % (N) | 4.55 (2,856) | 9.96 (4,099) | <.0001 |
GA<33 weeks, % (N) | 0.53 (334) | 2.65 (1,092) | <.0001 |
5th-95th percentile, wks | 37–41 | 35–41 | |
Birth weight | |||
Mean weight (sd), g. | 3,282 (641) | <.0001 | |
5th-95th percentile, g | 2695–4270 | 2265–4170 | |
Birth length | |||
Mean length (sd), cm | 50.4 (2.5) | 49.5 (3.7) | <.0001 |
5th-95th percentile, cm | 46–54 | 45–54 | |
Birth head circumference | |||
Mean circumference, cm | 34.7 (1.6) | 34.2 (2.4) | <.0001 |
5th-95th percentile, cm | 32–37 | 31–37 | |
Maternal characteristics | |||
Mean height, cm | 165.1 (6.7) | 164.7 (6.7) | <.0001 |
5th-95th percentile, cm | 154–176 | 153–176 | |
Mean age, y | 29.4 (5.2) | 28.5 (5.7) | <.0001 |
5th-95th percentile, y | 20–38 | 19–38 | |
Socio-economic Disadvantage† | 1009.3 (78.8) | 984.7 (86.0) | <.0001 |