Table 2.
Maternal Sociodemographic Characteristics by Treatment Group
| Characteristics | Control | 2000 IU | 4000 IU | p-value |
|---|---|---|---|---|
| Race/ethnicity (N, %) | ||||
| African-American | 28/110 (25.5) | 72/201 (35.8) | 68/193 (35.2) | 0.23 |
| Caucasian | 36/110 (32.7) | 42/201 (20.9) | 46/193 (23.8) | |
| Hispanic | 45/110 (40.9) | 85/201 (42.3) | 75/193 (38.9) | |
| Other | 1/110 (0.9) | 2/201 (1.0) | 4/193 (2.1) | |
| Age, years | 27 (18-41) | 26 (16-41) | 26 (17-44) | 0.40 |
| Parity | 2 (0-5) | 1 (0-7) | 1 (0-9) | 0.021 |
| Insurance | ||||
| None/Medicaid | 62/110 (56.4) | 149/201 (74.1) | 128/193 (66.3) | 0.006 |
| Education Some college or higher | 63/98 (64.3) | 87/191 (45.6) | 98/183 (53.6) | 0.010 |
| Season at enrollment | ||||
| Spring/Summer | 52/110 (47.3) | 106/201 (52.7) | 104/193 (53.9) | 0.52 |
Race, insurance, education, and season at enrollment compared between dose groups using chi-square tests. Age reported as median (min-max) and compared between dose groups using Kruskal-Wallis test. Parity compared between dose groups using Poisson regression.