Table 1.
Neonatal characteristics and maternal and fetal causes for preterm birth of the included very preterm neonates in the NIRS group and in the control group
| NIRS group n = 82 |
Control group n = 89 |
p-value | ||
|---|---|---|---|---|
| Gestational age, weeks, median (IQR) | 29.4 (27.4–30.4) | 28.7 (26.7–31.0) | 0.372 | |
| Gestational age < 28 weeks, n (%) | 22 (26.8) | 31 (34.8) | 0.258 | |
| Gestational age > 28 weeks, n (%) | 60 (73.2) | 58 (65.2) | 0.449 | |
| Birth weight, g, median (IQR) | 1190 (900–1450) | 1135 (900–1420) | 0.344 | |
| Male/female, n (%) | 46/36 (56.1/43.9) | 55/34 (61.8/38.2) | 0.449 | |
| Umbilical artery pH, median (IQR) | 7.33 (7.28–7.37) | 7.32 (7.28–7.36) | 0.509 | |
| Apgar 1, median (IQR) | 8.0 (6.0–8.0) | 7.0 (6.0–8.0) | 0.254 | |
| Apgar 5, median (IQR) | 8.0 (8.0–9.0) | 8.0 (8.0–9.0) | 0.066 | |
| Apgar 10, median (IQR) | 9.0 (9.0–9.0) | 9.0 (9.0–9.0) | 0.125 | |
| Maternal causes for preterm birth | ||||
| Antepartum bleeding, n (%) | 12 (14.6) | 4 (4.5) | 0.023 | |
| Chorioamnionitis, n (%) | 21 (25.6) | 30 (33.7) | 0.248 | |
| Premature rupture of membranes, n (%) | 21 (25.6) | 23 (25.8) | 0.927 | |
| Preeclampsia, n (%) | 16 (19.5) | 20 (22.5) | 0.635 | |
| Gestational diabetes, n (%) | 1 (1.2) | 4 (4.5) | 0.370 | |
| Others, n (%) | 16 (19.5) | 26 (29.2) | 0.141 | |
| Fetal causes for preterm birth | ||||
| Intrauterine growth restriction, n (%) | 15 (18.3) | 13 (16.9) | 0.805 | |
| Fetal bradycardia, n (%) | 14 (17.1) | 11 (12.4) | 0.373 | |
| Pathological doppler sonography, n (%) | 13 (15.9) | 12 (13.5) | 0.373 | |
| Multiples, n (%) | 10 (12.2) | 8 (9.0) | 0.495 | |
| Others, n (%) | 3 (3.7) | 2 (2.3) | 0.584 | |