Table 1.

Clinical characteristics of TOLSURF participants included in genetic studies of corticosteroid response by maternal self-reported race/ethnicity

	African-American (N=34)	Non-Hispanic White (n=36)
Demographics
Gestational age (weeks)	24.7 ± 1.0	25.6 ± 1.3
Birth weight (g)	667 ± 119	742 ± 169
Birth weight centile	42 ± 25	43 ± 31
Antenatal corticosteroid exposure	30 (78.9)	34 (87.2)
Cesarean delivery	23 (60.5)	29 (74.4)
Male sex	19 (50.0)	27 (69.2)
Product of multiple gestation	8 (21.1)	10 (25.6)
RSS and STEROID Variables
Postnatal age at start of steroid treatment (days)	29.2 ± 15.8	22.8 ± 9.09
Dexamethasone (N, %)	18 (47)	13 (33)
RSS at TOLSURF Study Entry	4.54 ± 2.52	4.66 ± 2.36
RSS at Day 0	6.85 ± 2.51	7.08 ± 3.12
RSS at Day 4	4.45 ± 2.74	4.97 ± 2.73
RSS at Day 7	3.69 ± 1.62	4.14 ± 2.80
BPD Diagnosis at 36 weeks* N (%)	26 (76.5)	32 (82.1)
BPD Diagnosis at 40 weeks* N (%)	16 (47.1)	23 (58.9)

RSS: Respiratory Severity Score, BPD: Bronchopulmonary Dysplasia

^*Among living infants, 4 of 38 AAs died before 36 weeks with no further deaths before 40 weeks. There were no deaths among the 39 NHW infants.