Table 1.
Maternal, infant, and delivery characteristics, California Perinatal Quality Care Collaborative, Stanford, CA, 2007-2013
| Mean | Standard deviation |
|
|---|---|---|
| Birth weight | 1050.6 | 282.6 |
| Gestational age | 27.9 | 2.4 |
| Maternal age | 29.5 | 6.8 |
|
| ||
| N | (%) | |
|
| ||
| Antenatal Steroids | ||
| Yes | 22645 | (87.2) |
| No | 3334 | (12.8) |
| Intraventricular Hemorrhage | ||
| None | 19814 | (76.3) |
| Grade 1 | 2898 | (11.2) |
| Grade 2 | 1317 | (5.1) |
| Grade 3 | 850 | (3.3) |
| Grade 4 | 1100 | (4.2) |
| Maternal race / ethnicity | ||
| Black | 3667 | (14.2) |
| Hispanic | 11278 | (43.8) |
| Non-Hispanic White | 6954 | (27.0) |
| Asian/Pacific Islander | 3175 | (12.3) |
| American Indian or Alaska Native | 160 | (0.6) |
| Other | 512 | (2.0) |
| Prenatal Care | ||
| Yes | 25119 | (97.0) |
| No | 778 | (3.0) |
| Multiple gestation | ||
| Singleton | 18777 | (72.3) |
| Multiple | 7201 | (27.7) |
| Mode of delivery | ||
| Vaginal | 6514 | (25.1) |
| Cesarean | 19464 | (74.9) |
| Neonatal unit level | ||
| Regional | 7145 | (27.5) |
| Community | 16651 | (64.1) |
| Intermediate | 856 | (3.3) |
| Non-CCS | 1327 | (5.1) |
| Congenital malformation | ||
| Yes | 2397 | (9.2) |
| No | 23571 | (90.8) |
| Small for gestational age | ||
| Yes | 3224 | (12.4) |
| No | 22752 | (87.6) |
| Apgar score – 5 minute | ||
| 0-3 | 1187 | (4.6) |
| 4-6 | 4330 | (16.7) |
| 7-10 | 20417 | (78.7) |
| Sex | ||
| Male | 13343 | (51.4) |
| Female | 12632 | (48.6) |
(N) number of records were missing for the following variables: gestational age (3), maternal age (14), maternal race / ethnicity (233), prenatal care (82), multiple gestation (1), mode of delivery (1), congenital malformation (11), small for gestational age (11), Apgar score (45), sex (4)