Table 2.
Demographic and clinical profile of California births in 2006 by hospital obstetric volume.
| Non-rural | Rural | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| Overall (N=488,622 births; n=211 hospitals) | Hospital volume (deliveries/year) | Overall (N=38,995 births; n=57 hospitals) | Hospital volume (deliveries/year) | ||||||
| 1 50 – 1199 (N=36,038; n=50) |
2 1200 – 2399 (N= 139,548; n=78) |
3 2400 – 3599 (N= 155,883; n=52) |
4 ≥3600 (N= 157,153; n=31) |
R1 50 – 599 (N=11,818; n=36) |
R2 600 – 1699 (N=14,941; n=16) |
R3 ≥1700 (N=12,236; n=5) |
|||
| LBW | 7.3 | 5.6 | 6.6 | 7.4 | 8.2 | 5.3 | 5.0 | 5.3 | 5.6 |
| PTB | 11.1 | 8.7 | 9.9 | 11.5 | 12.4 | 10.2 | 9.0 | 10.0 | 11.7 |
| Singleton birth | 96.7 | 97.9 | 97.2 | 96.6 | 96.2 | 98.1 | 98.1 | 97.8 | 98.4 |
| Nulliparous | 39.5 | 38.4 | 39.9 | 39.2 | 39.7 | 35.7 | 39.5 | 34.5 | 33.5 |
| Advanced maternal age | 18.2 | 18.9 | 18.1 | 17.2 | 19.2 | 10.4 | 11.1 | 10.5 | 9.7 |
| Prior cesarean | 15.0 | 14.9 | 14.3 | 14.8 | 15.7 | 15.1 | 12.4 | 17.4 | 14.9 |
| Education ≥12 yrs | 47.4 | 47.0 | 45.9 | 48.4 | 48.0 | 30.6 | 37.5 | 31.8 | 22.6 |
| Race/ethnicity | |||||||||
| White | 32.9 | 39.1 | 35.2 | 31.9 | 30.3 | 39.4 | 63.0 | 31.5 | 26.3 |
| Black | 5.5 | 4.8 | 4.6 | 5.9 | 6.2 | 2.6 | 2.6 | 1.9 | 3.6 |
| Hispanic | 46.5 | 42.2 | 46.9 | 46.3 | 47.4 | 51.9 | 25.5 | 62.0 | 64.9 |
| Asian-American | 12.4 | 10.9 | 10.6 | 13.2 | 13.5 | 2.5 | 2.9 | 1.8 | 3.0 |
| Other | 2.7 | 3.0 | 2.7 | 2.7 | 2.6 | 3.6 | 6.0 | 2.8 | 2.2 |
LBW: low birthweight; PTB: preterm birth
All number in table are percentages.