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Table 2 Pregnancy outcome, stratified for study and control groups

From: Pregnancy outcome following fetal reduction from dichorionic twins to singleton gestation

Outcome Fetal Reduction
n = 98
Ongoing Twins
n = 222a
P-value
Gestational Age at Delivery, weeks 36.8 ± 3 35.6 ± 2.4 < 0.001
Preterm birth < 37 weeks: 38 (39.6%) 128 (57.2%) < 0.001
 Spontaneousb 33 (86.6%) 76 (59.4%) < 0.001
 Iatrogenicb 5 (13.6%) 52 (40.6%) < 0.001
Preterm birth< 34 weeks: 12 (12.5%) 41 (18.5%) 0.2
 Spontaneousb 11 (91.7%) 27 (65.8%) 0.06
 Iatrogenicb 1 (8.3%) 14 (34.2%) 0.06
Preterm Premature Rupture of Membranes 11 (11.6%) 35 (15.8%) 0.09
Neonatal birthweighta, grams 2703.6 ± 708.9 2193.1 ± 559.9 < 0.001
Neonatal birthweighta, centiles 44.9 ± 27.5 44.2 ± 25.9 0.8375
Birth weight < 10th percentilea 9 (9.2%) 41 (9.2%) 0.08
Birth weight < 5th percentilea 6 (5.1%) 20 (4.5%) 0.6
Gestational Diabetes Mellitus 9 (9.2%) 25 (11.3%) 0.55
Hypertensive disorders in pregnancy 2 (2.0%) 12 (5.4%) 0.24
Composite outcome 39 (39.8%) 141 (63.5%) < 0.001
Mode of Delivery:
 Vaginal Delivery 49 (50.0%) 37 (16.7%) < 0.001
 Assisted Delivery 5 (5.1%) 10 (4.5%)
 Cesarean Delivery 42 (42.9%) 175 (79.0%)
Labor onset:
 Spontaneous onset 52 (53.1%) 55 (24.8%) < 0.001
 Induction of labor 8 (8.2%) 21 (9.5%)
 No trial of labor 36 (36.7%) 145 (65.3%)
5-min Apgar < 7 2 (2.0%) 1 (0.22%) 0.592
Late Abortion 0 1 (0.45%) 0.551
Intra Uterine Fetal Death 0 (0) 2 (0.9%) 0.556
Procedure Related Loss 2 (2.0%) 0 (0)
  1. Data presented as number (%) or as mean ± standard deviation
  2. a For the non-reduced group, neonatal outcomes are presented for 444 newborns
  3. b Presented as percentage out of the preterm births