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Demographics of study subjects
| Subject characteristics | CB or DB measurements in 1st 2 weeks after birth |
P-value | |
|---|---|---|---|
| No (N=204,755) | Yes (N=66,431) | ||
| Female | (50.4) | (45.0) | <0.001 |
| Ethnicity | <0.001 | ||
| White | (53.5) | (48.4) | |
| Asian | (15.9) | (23.8) | |
| Black | (8.8) | (6.6) | |
| Latino | (3.9) | (3.9) | |
| Other/Unknown | (17.9) | (17.2) | |
| Gestation age (weeks) | <0.001 | ||
| 37 | (5.2) | (10.5) | |
| 38 | (13.9) | (18.7) | |
| 39 | (28.1) | (29.0) | |
| 40 | (34.8) | (28.6) | |
| ≥41 | (18.0) | (13.2) | |
| Birthweight (grams) | 3510 ± 475 | 3447 ± 506 | <0.001 |
