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Table 1 Characteristics of women who underwent pre-labor cesarean section (PrlCS) or induction of labor (IOL)

From: Cesarean delivery or induction of labor in pre-labor twin gestations: a secondary analysis of the twin birth study

Characteristic n (%) PrlCS (n = 938) IOL (n = 409) P
Maternal age (y) mean ± SD 29.7 ± 6.1 30.5 ± 6.1 0.01
≥30 445 (47.4) 212 (51.8) 0.14
Parity ≥1 560 (59.7) 208 (50.9) 0.003
Previous cesarean section 95 (10.1) 18 (4.4) 0.0005
Estimated fetal weight
 First twin (g) mean ± SD 2245 ± 430 2284 ± 420 0.12
 Second twin (g) mean ± SD 2225 ± 422 2291 ± 432 0.008
Mode of delivery
 Vaginal for both 0 240 (58.7)  
 Cesarean for both 938 (100.00) 155 (37.9) <  0.0001
 Vaginal/cesarean 0 14 (3.4)  
Presentation at delivery
 Cephalic/Cephalic 503 (53.6) 276 (67.5)  
 Cephalic/Non-cephalic 376 (40.1) 131 (32.0) <  0.0001
 First twin in non-cephalic 58 (6.2) 2 (0.5)  
Gestational age at delivery (wk)
 Mean ± SD 37.01 ± 1.35 37.51 ± 1.17 <  0.0001
 32 wk. 0 days to 33 wk. 6 days 30 (3.2) 3 (0.7)  
 34 wk. 0 days to 36 wk. 6 days 328 (35.0) 115 (28.1)  
 37 wk. 0 days to 38 wk. 6 days 560 (59.7) 270 (66.0) <  0.0001
  ≥ 39 wk. 0 days 20 (2.1) 21 (5.1)  
Interval between deliveries (min) Mean ± SD 2.2 ± 3.2 12.2 ± 21.2 <  0.0001
Use of antenatal corticosteroids 274 (29.2) 78 (19.1) <  0.0001
Chorionicity at birth
 Dichorionic- diamnionic 699 (74.5) 304 (74.3) 0.91
 Monochorionic-diamnionic 214 (22.8) 92 (22.5)  
 Monochorionic-monoamniotic 1 (0.1) 1 (0.2)  
 Undocumented 24 (2.6) 12 (2.9)  
  1. PrlCS Pre-labor cesarean section, IOL Induction of labor