Table 1.
Characteristics of cases and controls at birth of child
| 37 weeks and above | Under 37 weeks | |||
|---|---|---|---|---|
| Cases (n =33) | Controls (n =33) | Cases (n =20) | Controls (n = 20) | |
| Biological/Clinical | ||||
| Mean Gestational Age | 39.5 wks (±1.2) | 39.6 wks (±1.1) | 30.2 wks (±3.6) | 31.8 wks (±3.7) |
| Mean Birthweight | 3,372 g (±495) | 3,562 g (±432) | 1,884 g (±889) | 2,106 g (±902) |
| Fetal Growth Ratioa | 0.99 | 1.04 | 0.95 | 1.01 |
| % Small for Gestational Agea | 9% | 6% | 10% | 5% |
| Mean 5 minute Apgar Score | 8.2 (± 1.6) | 8.8 (±0.6) | 7.5 (±1.4) | 8.5 (±0.7) |
| % Admitted to NICU | 36% | 9% | 95% | 78% |
| Age blood spot obtained | 1.7 days (±1.9) | 1.3 days (±0.5) | 1.5 days (±1.7) | 1.2 days (±0.9) |
| Socio-Demographic | ||||
| % Black | 12% | 3% | 10% | 20% |
| % Hispanic | 0 | 4% | 6% | 0 |
| % White or other | 88% | 93% | 84% | 80% |
| % Mother married | 82% | 82% | 71% | 82% |
| % Home ownership | 86% | 68% | 59% | 71% |
| % Medicaid support | 21% | 6% | 25% | 35% |
a
Ref. (38) was used as the source of fetal growth standards. (Fetal growth ratio = infant’s BW/median BW for gestational week.)
Bolded case-control contrasts, p <.05