Table 2.
Neonatal data for boys, girls, and combined in preterm (< 37 weeks) pregnancies
| Total (N = 576) | Boys (N = 317, 55.0%) | Girls (N = 259, 45.0%) | p value* | |
|---|---|---|---|---|
| GA at birth (wks, 0/7d), mean ± std | 34wks6/7 ± 2wks2/7 | 35wks0/7 ± 2wks1/7 | 34wks5/7 ± 2wks3/7 | 0.19 |
| Birth weight (g), mean ± std | 2481 ± 637 | 2553 ± 604 | 2392 ± 665 | 0.003 |
| Length (cm), mean ± std | 46.3 ± 4.2 | 46.8 ± 4.1 | 45.7 ± 4.3 | 0.005 |
| HC (cm), mean ± std | 32.5 ± 2.5 | 32.8 ± 2.4 | 32.2 ± 2.6 | 0.006 |
| 1-min AS ≤ 5 | 8.1% | 8.6% | 7.4% | 0.62 |
| 5-min AS ≤ 7 | 7.9% | 8.9% | 6.7% | 0.32 |
| pH Umb Art, mean ± std | 7.29 ± 0.07 | 7.285 ± 0.070 | 7.289 ± 0.076 | 0.50 |
Neonatal demographic data available in 576 preterm cases “2002–2012.” *p value represents difference in boys vs girls
GA gestational age, wks weeks d days, g gram, cm centimeter, HC head circumference, AS Apgar scores, pH pondus hydrogenium, Umb Art umbilical artery, std standard deviation