Table 5 Composite primary and secondary outcomes* and mean umbilical cord arterial and venous pH values in the second twin according to twin-to-twin time interval ≤ 30 min or > 30 min
From: The effect of twin-to-twin delivery time intervals on neonatal outcome for second twins
0–30 min N = 360 | > 30 min N = 167 | p-value | |
|---|---|---|---|
Primary composite outcome | 5 (1.4) | 9 (5.4) | 0.016 |
pH < 7.05 and BE < −12 or pH < 7.00 | 3/290 (1) | 9/136 (6.6) | 0.002 |
Apgar score < 4 at 5 min | 2/357 (0.6) | 0 | 1.0 |
Perinatal mortality | 2 (0.6) | 0 | 1.0 |
Neonatal mortality | 0 | 0 | 1.0 |
Secondary composite outcome | 61 (16.9) | 31 (18.6) | 0.71 |
Apgar < 7 at 5 min | 8 (2.2) | 1 (0.6) | 0.28 |
pH < 7.10 | 18/290 | 22/136 | 0.002 |
Admitted to NICU | 88/360 | 35/167 | 0.44 |
NICU, mean (SD), median, (range) days | 11 (7.2) 10 (1–35) | 12 (7.7) 9 (2–37) | 0.26 |
NICU > 7 days | 54/88 | 22/35 | 1.0 |
IRDS | 4/360 | 1/167 | 1.0 |
TTN | 6/360 | 4/167 | 0.73 |
Septicemia | 2/360 | 0/167 | 1.0 |
NEC | 1/360 | 0/167 | 1.0 |
Assisted ventilation | 21/360 | 9/167 | 1.0 |
Mean a-pH (SD) | 7.23 (0.08) N = 290 | 7.20 (0.09) N = 136 | < 0.0001 |
Mean v-pH (SD) | 7.29 (0.08) N = 284 | 7.27 (0.09) N = 140 | 0.016 |