Table 1:
Selected maternal and neonatal characteristics of cohort.
| Overall cohort (N = 5330) |
BMZ-exposed (N = 1459) |
BMZ not-exposed (N = 3871) |
P value | |
|---|---|---|---|---|
| Maternal characteristics | ||||
| Age (years), mean (SD) | 27.0 (5.9) | 27.5 (6.0) | 26.8 (5.8) | <.001 |
| Ethnicity | ||||
| Hispanic or Latino | 329 (6.2%) | 90 (6.2%) | 239 (6.2%) | 0.811 |
| Not Hispanic or Latino | 4903 (92.0%) | 1345 (92.2%) | 3558 (91.9%) | |
| Unknown | 98 (1.8%) | 24 (1.6%) | 74 (1.9%) | |
| Race | ||||
| Black | 1204 (22.6%) | 292 (20.0%) | 912 (23.6%) | 0.022 |
| White | 3803 (71.4%) | 1077 (73.8%) | 2726 (70.4%) | |
| Other/Unknown | 323 (6.1%) | 90 (6.2%) | 233 (6.0%) | |
| Insurance | ||||
| Medicaid/Government | 2941 (55.2%) | 785 (53.8%) | 2156 (55.7%) | 0.125 |
| Private | 2315 (43.4%) | 647 (44.3%) | 1668 (43.1%) | |
| None | 74 (1.4%) | 27 (1.9%) | 47 (1.2%) | |
| Maternal diabetes, yes | 326 (6.1%) | 139 (9.5%) | 187 (4.8%) | <.001 |
| Maternal asthma, yes | 144 (2.7%) | 78 (5.3%) | 66 (1.7%) | <.001 |
| Maternal hypertensive disorder, yes | 584 (11.0%) | 365 (25.0%) | 219 (5.7%) | <.001 |
| EGA when received BMZ or were evaluated for threatened preterm labor, mean (SD) | 32.8 (4.6) | 32.2 (3.3)a | 33.0 (5.0) | |
| Neonatal characteristics | ||||
| EGA at delivery (weeks), mean (SD) | 38.9 (1.1) | 38.4 (1.1) | 39.1 (1.1) | <.001 |
| Birth length (cm), mean (SD) | 52.0 (77.6) | 50.5 (17.4) | 52.6 (90.3) | 0.179 |
| Head circumference at birth (cm), mean (SD) | 34.3 (9.5) | 33.9 (9.1) | 34.4 (9.7) | 0.128 |
| Birth weight (gram), mean (SD) | 3289.9 (497.4) | 3153.8 (575.9) | 3341.1 (454.1) | <.001 |
a
The gestational age for women that did not receive BMZ at the time of evaluation for threatened preterm labor is provided. This is provided for descriptive purposes only and not considered as a covariate since it is not directly comparable between exposure groups.
BMZ= betamethasone; EGA= estimated gestational age