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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