Skip to main content

Table 1 Comparison of baseline characteristics between growth discordant twin and normal twin

From: Predictive value of prenatal ultrasound parameters for dichorionic growth discordant twins

  Growth discordant group (n = 71) Normal growth group(n = 346) P
Maternal age (\( \overline{x}\pm s \), yrs) 29.33 ± 4.72 29.42 ± 4.54 0.899
Pre-gestation BMIa (\( \overline{x}\pm s \), kg/m2) 22.56 ± 3.72 22.13 ± 1.50 0.157
Pre-delivery BMI(\( \overline{x}\pm s \), kg/m2) 28.15 ± 2.73 28.38 ± 3.53 0.923
Gravidity [M (min-max), times] 1 (0–3) 1 (0–6) 0.071
Nulliparity(n%) 48 (67.60) 259 (74.85) 0.207
Chronic diseases(n%) 9 (12.68) 55 (15.89) 0.493
Obstetrical complications(n%) 59 (83.10) 272 (78.61) 0.395
Week for ultrasound [M (min-max), w]
 First-trimester 13.00 (12.02–13.51) 13.00 (11.10–14.05) 0.221
 Second-trimester 22.20 (17.02–26.03) 22.20 (21.05–27.61) 0.598
 Early third-trimester 32.00 (28.03–33.00) 32.10 (28.05–34.05) 0.841
 Late third-trimester 35.65 (34.01–40.30) 36.40 (34.12–40.00) 0.037
Delivery week [M (min-max), w] 36.52 (33.65–38.02) 37.10 (32.03–40.01) 0.347
Interval between delivery and the last ultrasound [M (min-max), d] 5.02 (3.15–8.12) 6.30 (4.05–8.19) 0.385
  1. aBMI body mass index