SES group | Lowest | Middle | Highest |
---|---|---|---|
n | 8203 | 8854 | 8255 |
Maternal characteristics | |||
maternal age group, years | |||
<19 | 10.3 | 3.3 | 1.7 |
>34 | 8.1 | 12.9 | 17.5 |
primiparous, % | 33.3 | 40.2 | 40.6 |
CS, % | 17.5 | 21.9 | 23.0 |
maternal diabetes, % | 7.2 | 4.2 | 3.0 |
induced delivery, % | 25.5 | 27.9 | 26.9 |
multiple gestation, % | 1.7 | 2.0 | 2.8 |
rural, % | 45.8 | 44.5 | 42.3 |
breastfed, % | 69.1 | 84.8 | 90.6 |
rural, % | 45.8 | 44.5 | 42.3 |
male, % | 51.3 | 51.4 | 51.0 |
mean BW, grams (SD) | 3482 (554) | 3505 (534) | 3492 (526) |
BW range, grams | 1216– 6208 | 1172– 6457 | 1331– 5746 |
Large for GA, % | 16.0 | 15.0 | 13.8 |
Small for GA, % | 8.0 | 7.4 | 7.0 |
resuscitation at birth, % | 8.0 | 7.6 | 7.0 |
median LOS, days (range) | 2 (1–103) | 2 (1–168) | 2 (1–51) |
premature, % | 7.1 | 5.4 | 5.7 |
major congenital anomaly, % | 2.8 | 2.6 | 2.1 |