Table 1.
Maternal sociodemographic and clinical characteristics of cohort
| Characteristic | Combined Cohort (N=509 ) | NICHD Cohort (N=346) | TRF Cohort (N=163) | p-value* (comparing NICHD v.TRF) |
|---|---|---|---|---|
| Race/ethnicity (N, %) | <0.0001 | |||
| Hispanic | 207 (41%) | 137 (40%) | 70 (43%) | |
| Black | 169 (33%) | 96 (28%) | 73 (45%) | |
| White | 129 (25%) | 113 (33%) | 16(10%) | |
| Other | 4 (1%) | 0 (0°%) | 4 (3%) | |
| Maternal age, years (median and range) | 26 (16-44) | 26 (16-44) | 24 (16-39) | <0.0001 |
| Parity (median and range) | 1 (0-9) | 2 (0-9) | 1 (0-4) | <0.0001 |
| Gravidity (median and range)** | 2 (1-9) | 2 (1-9) | 2 (1-6) | <0.0001 |
| Insurance status (N,%)** | <0.0001 | |||
| None/Medicaid | 342 (68%) | 214 (63%) | 128 (79%) | |
| Marital status (N,%)** | <0.0001 | |||
| Married | 234 (46%) | 178 (52%) | 56 (34%) | |
| Education level (N,%)** | <0.0001 | |||
| Some college or higher | 267 (54%) | 213 (65%) | 54 (33%) | |
| Baseline Maternal 25(OH)D, ng/mL | 0.47 | |||
| Mean (SD) | 23 (9.7) | 24 (9.7) | 23 (9.6) | |
| Birth Outcome (N,%) | 0.20 | |||
| Preterm (<37 weeks) | 50 (10%) | 30 (9%) | 20 (12%) | |
*
Statistical comparison of characteristics between NICHD and Thrasher Research Fund (TRF) cohorts. Race, insurance status, marital status, education level, and birth outcome compared using chi-square tests. Maternal age compared using Mann-Whitney test. Parity and gravidity compared using Poisson regression. Baseline maternal 25(OH)D compared using t-test.
**
24 participants missing gravidity data, 4 missing insurance status data, 2 missing marital status data, and 17 missing education level data.