Table 1 Distributions of birth weight, gestational age, and maternal smoking in relation to neonatal survival status
From: Reexamining the effects of gestational age, fetal growth, and maternal smoking on neonatal mortality
Neonatal survivors | Neonatal deaths | |
|---|---|---|
Total events | 10,084,106 | 27,355 |
Maternal age (years)† | 27.0 (6.2) | 26.4 (6.7) |
Primigravida | 33.2% | 34.1%¶ |
Birth weight (grams)† | 3,347 (572) | 1,765 (1,145) |
Birth weight <2,500 grams | 6.1% | 69.6% |
Birth weight <1,500 grams | 1.1% | 62.3% |
z-score birth weight† | 0.00 (1.00) | -0.62 (1.07) |
Gestational age (weeks)† | 38.9 (2.3) | 31.3 (6.6) |
Delivered <37 weeks | 10.3% | 67.9% |
Delivered <34 weeks | 3.0% | 63.6% |
Delivered <32 weeks | 1.7% | 61.2% |
Smoking during pregnancy | ||
Smokers | 16.5% | 19.1% |
Cigarettes smoked/day‡ | 11 (1–40) | 15 (1–40) |