Table 1 Distribution of demographic characteristics, neonatal morbidities and maternal/fetal characteristics of the study population overall and stratified by composite neonatal morbidity risk scores; ANOVA and χ2 tests were used to assess differences in characteristics across the levels of risk scores
Sample characteristics (N = 532) | Stratified by Risk Score | |||||
|---|---|---|---|---|---|---|
|  | Overall | 0 (n = 213) | 1 (n = 193) | 2 (n = 98) | 3 + (n = 28) | p value |
BPD (%) | 273 (51.3) | 0 (0.0) | 152 (78.8) | 94 (95.9) | 27 (96.4) | < 0.001 |
INF (%) | 99 (18.6) | 0 (0.0) | 24 (12.4) | 56 (57.1) | 19 (67.9) | < 0.001 |
SBI (%) | 68 (12.8) | 0 (0.0) | 16 (8.3) | 31 (31.6) | 21 (75.0) | < 0.001 |
ROP (%) | 34 (6.4) | 0 (0.0) | 1 (0.5) | 15 (15.3) | 18 (64.3) | < 0.001 |
GA (weeks) | 27.01 (1.92) | 27.95 (1.46) | 26.92 (1.83) | 25.74 (1.85) | 24.91 (1.50) | < 0.001 |
PMA (weeks) | 39.08 (3.29) | 36.77 (1.87) | 39.77 (2.79) | 41.97 (3.31) | 41.81 (2.77) | < 0.001 |
Race and ethnicity (%) | Â | Â | Â | Â | Â | 0.05 |
 Hispanic other | 68 (12.8) | 26 (12.2) | 20 (10.4) | 19 (19.4) | 3 (10.7) |  |
 Hispanic white | 43 (8.1) | 13 (6.1) | 16 (8.3) | 11 (11.2) | 3 (10.7) |  |
 Non-Hispanic other | 180 (33.8) | 76 (35.7) | 70 (36.3) | 29 (29.6) | 5 (17.9) |  |
 Non-Hispanic white | 234 (44.0) | 94 (44.1) | 86 (44.6) | 39 (39.8) | 15 (53.6) |  |
 Not reported | 7 (1.3) | 4 (1.9) | 1 (0.5) | 0 (0.0) | 2 (7.1) |  |
Outborn (%) | 112 (21.1) | 30 (14.1) | 34 (17.6) | 37 (37.8) | 11 (39.3) | < 0.001 |
Male (%) | 297 (55.8) | 130 (61.0) | 100 (51.8) | 54 (55.1) | 13 (46.4) | 0.201 |
Maternal age (years) | 29.10 (6.39) | 29.13 (6.60) | 29.49 (6.02) | 28.35 (6.77) | 28.95 (5.93) | 0.556 |
Education < HS/GED (%) | 72 (13.9) | 28 (13.7) | 21 (11.1) | 19 (19.6) | 4 (14.8) | 0.276 |
Lowest SES (%) | 42 (8.1) | 15 (7.4) | 15 (7.9) | 8 (8.2) | 4 (14.8) | 0.615 |
Recruitment site (%) | Â | Â | Â | Â | Â | 0.001 |
 WIH | 94 (17.7) | 30 (14.1) | 47 (24.4) | 12 (12.2) | 5 (17.9) |  |
 SHD | 100 (18.8) | 52 (24.4) | 31 (16.1) | 12 (12.2) | 5 (17.9) |  |
 KMC | 88 (16.5) | 44 (20.7) | 25 (13.0) | 15 (15.3) | 4 (14.3) |  |
 CMH | 68 (12.8) | 16 (7.5) | 25 (13.0) | 22 (22.4) | 5 (17.9) |  |
 WFU | 113 (21.2) | 50 (23.5) | 35 (18.1) | 21 (21.4) | 7 (25.0) |  |
 LUB | 69 (13.0) | 21 (9.9) | 30 (15.5) | 16 (16.3) | 2 (7.1) |  |