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Table 1 Baseline characteristics, stratified for study and control groups

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

Baseline characteristics Fetal Reduction
n = 98
Ongoing Twins
n = 222
P-value
Maternal Age, years 34.1 ± 5.0 33.6 ± 5.0 0.39
Body mass indexa, kg/m2 24.4 ± 4.6 24.9 ± 5.7 0.6
Nulliparity 25 (25.5%) 100 (45%) 0.001
High Risk for Preterm Birth 16 (16.8%) 23 (10.4%) 0.134
Mode of Conception:
 Spontaneous 29 (29.6%) 88 (39.6%) < 0.001
 Controlled Ovarian Hyperstimulation 22 (22.45%) 32 (14.4%)
 In Vitro Fertilization 45 (45.9%) 102 (46%)
Comorbidities:
 Mullerian Anomalies 2 (2.0%) 3 (1.3%) 0.6
 Thrombophilia 6 (6.1%) 1 (0.4%) 0.004
 Diabetes Mellitus 4 (4%) 7 (3.1%) 0.7
 Hypothyroidism 11 (11.2%) 9 (4%) 0.02
 Chronic Hypertension 0 5 (2.2%) 0.328
Procedure Trimester:
 First Trimester 36 (36.7%)
 Second and Third Trimester 62 (63.3%)
Indication Category:
 Elective 20 (20.4%) 0
 Risk Factors 10 (10.2%) 0
 Anomalies 66 (67.35%) 0
 Unknown 2 (2.0%)
  1. Data presented as mean ± standard deviation for continuous variables and n(%) for categorical variables
  2. a Data available for 34 patients in the reduced group and for 123 patients in the non-reduced group