Table 1.
Descriptive Statistics of Entire Sample, Maternal–Fetal Medicine (MFM), and General Obstetrics Practice (GOP) Pregnant Women.
| Variable | Total Sample | MFM | GOP |
|---|---|---|---|
| N = 140 | n = 70 | n = 70 | |
| Mean ± SD or n (%) | Mean ± SD or n (% MFM) | Mean ± SD or n (% GOP) | |
| Demographic | |||
| Maternal age (years) | 28.8 ± 5.1 | 29.4 ± 5.2 | 28.3 ± 5.0 |
| Maternal racea | |||
| White | 94 (67.1) | 53 (75.7) | 41 (58.6) |
| Black | 26 (18.6) | 9 (12.9) | 17 (24.3) |
| Other | 19 (13.6) | 7 (10.0) | 12 (17.1) |
| Unknown | 1 (0.7) | 1 (1.4) | 0 |
| Maternal ethnicity | |||
| Non-Hispanic | 124 (88.6) | 62 (88.6) | 62 (88.6) |
| Hispanic | 15 (10.7) | 7 (10.0) | 8 (11.4) |
| Unknown | 1 (0.7) | 1 (1.4) | 0 |
| Private insurance | |||
| Yes | 74 (52.9) | 34 (48.6) | 40 (57.1) |
| Unknown | 7 (5.0) | 4 (5.7) | 3 (4.3) |
| Outcome | |||
| Delivery modeb | |||
| Vaginal | 93 (70.5) | 38 (57.6) | 55 (83.3) |
| Cesarean | 39 (29.5) | 28 (42.4) | 11 (16.7) |
| Preeclampsiac | 17 (12.8) | 14 (20.6) | 3 (4.6) |
| Preterm birthd | 39 (29.8) | 29 (42.6) | 10 (15.9) |
| Gestational age at birth (weeks)e | 38 3/7 ± 2 | 37 4/7 ± 2 | 39 2/7 ± 1 |
| Birth weight (g)e | 3,277.4 ± 611.7 | 3,158.5 ± 653.3 | 3,400.0 ± 543.8 |
Note. We used χ2 and t tests to test for significant differences between the MFM and GOP groups. See notes below. Of the N = 140 pregnant women who started the study, we followed n = 134 until delivery. There were n = 5 miscarriages, n = 2 who withdrew before delivery, n = 6 who delivered off-site, and n = 130 infants born on-site, including n = 3 sets of twins. We collected data on N = 140 mothers (n = 70: MFM, n = 70: GOP) for the demographic variables. Sample sizes for outcome measures as indicated.
a p = .071 using χ2 tests. b n = 66 in each group; p = .001. c n = 68 MFM, 65 GOP; p = .005. dPreterm birth defined as ≤38 weeks’ gestation at birth; n = 68: MFM, 63 GOP; p = .001. e n = 66 MFM, 64 GOP.