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. 2018 Mar 5;13(3):e0193835. doi: 10.1371/journal.pone.0193835

Table 2. Demographic characteristics of participating infants.

Mean ± STD, Number (%), or Median (IQR)
Study Cohort (n = 64) All NICU-HEALTH phase I Participants (n = 81)
Demographic factors
Private insurance (#, %, vs Medicaid) 49 (76.6%) 63 (77.8%)
Racial/ethnic minority 31 (48.4%) 40 (49.4%)
White 37 (57.8%) 47 (58.0%)
Black 18 (28.1%) 24 (29.6%)
Asian 6 (9.4%) 7 (8.6%)
Hispanic 5 (7.8%) 6 (7.4%)
Male infant gender 31 (48.4%) 39 (48.1%)
Maternal/antenatal factors
Maternal parity at index pregnancy 2 (1, 3) 2 (1, 3)
Maternal age at delivery, years 33.1 ± 7.3 33.0 ± 7.0
Mulitple gestation 38 (59.4%) 44 (54.3%)
Antenatal steroids 63 (98.4%) 80 (98.8%)
Antenatal magnesium sulfate 62 (96.9%) 77 (95.1%)
PPROM 24 (37.5%) 30 (37.0%)
IUGR 10 (15.6%) 16 (19.8%)
Pre-eclampsia 12 (18.8%) 18 (22.2%)
Assisted reproductive technology 28 (43.8%) 32 (39.5%)
Cesarean delivery 57 (89.0%) 72 (88.9%)
Birth Characteristics
Gestational age at birth (weeks) 28.3 ± 2.2 28.4 ± 2.2
Birth weight (g) 1080 ± 270 1090 ± 270
SGA 4 (6.3%) 7 (8.6%)
1 min Apgar 8 (5, 9) 8 (6, 9)
5 min Apgar 9 (8, 9) 9 (8, 9)
CRIB II Score 8 (6, 11) 8 (6, 11)
Morbidities of Prematurity
Hypotension requiring pressors 21 (32.8%) 23 (28.4%)
Bronchopulmonary dysplasia 25 (39.1%) 28 (34.6%)
Necrotizing enterocolitis 1 (1.6%) 2 (2.5%)
Culture proven sepsis 11 (17.2%) 14 (17.3%)
Retinopathy of prematurity stage 2–4 12 (18.8%) 12 (14.8%)
Intraventricular hemorrhage grade II-IV 7 (10.9%) 7 (8.6%)
PMA at NNNS assessment (weeks) 34.6 ± 0.6 N/A