Table 1.
Maternal and infant characteristics.
| Low-visit | High-visit | p | |
|---|---|---|---|
| Maternal characteristics | N = 10 | N = 16 | |
| Maternal age, years M ± SD | 26.6 ± 5 | 29.9 ± 5 | 0.09 |
| Gravida, N (%) | 0.04 | ||
| 1 | 1 (10) | 9 (56) | |
| 2 | 6 (60) | 2 (13) | |
| ≥3 | 3 (30) | 5 (31) | |
| Public insurance, N (%) | 7 (70) | 6 (38) | 0.24 |
| Race, N (%) | |||
| White | 6 (60) | 12 (75) | 0.72 |
| Black | 1 (10) | 2 (13) | |
| Hispanic | 1 (10) | 1 (6) | |
| Other | 2 (20) | 1 (6) | |
| Prenatal care, N (%) | 8 (80) | 15/15 (100) | 0.07 |
| Vaginal delivery, N (%) | 4 (40) | 7 (44) | 0.64 |
| Infant characteristics | N = 12 | N = 17 | |
| Twins | 2 sets | 1 set | |
| Gestational age, weeks M ± SD | 28.5 ± 5.2 | 31.2 ± 4.6 | 0.14 |
| Birth weight, grams M ± SD | 1210 ± 833 | 1796 ± 1209 | 0.16 |
| Male sex, N (%) | 7 (58) | 12 (71) | 0.49 |
| RDS, N (%) | 8 (67) | 10 (59) | 0.67 |
| BPD, N (%) | 4 (33) | 4 (24) | 0.56 |
| Days in hospital, M ± SD (median) | 94 ± 45 (93) | 63 ± 32 (54) | 0.049 |
| Days on ventilator, M ± SD (median) | 25.6 ± 37 (3) | 9.3 ± 18 (1.0) | 0.17 |
| Recording 1 | N = 12 | N = 17 | |
| Total hours of recording analyzed | 175 | 261 | |
| PMA, weeks, M ± SD | 38.1 ± 3.3 | 37.3 ± 3.8 | 0.66 |
| Recording 2 | N = 8 | N = 14 | |
| Total hours of recording analyzed | 110 | 203 | |
| PMA, weeks, M ± SD | 40.7 ± 4.1 | 38.4 ± 4.2 | 0.20 |
RDS respiratory distress syndrome, BPD bronchopulmonary dysplasia, PMA post-menstrual age.