Table 3 Comparison of the clinical characteristics of sIUGR twins and IUGR singleton pregnancies.

From: Metabolic Biomarkers of Monochorionic Twins Complicated With Selective Intrauterine Growth Restriction in Cord Plasma and Placental Tissue

Characteristics

sIUGR group (n = 15)

IUGR group (n = 14)

P-Value

Maternal age (years)

30 ± 4

30 ± 4

0.62a

Body mass index (kg/m2)

21.0 ± 2.5

21.7 ± 2.7

0.53a

Primigravida

9/15 (60%)

8/15 (53%)

0.58c

Smoking

0/15 (0%)

0/14 (0%)

1.00d

Gestational age at delivery (wks)

35 (34, 37)

38 (37, 38)

0.0004b**

Delivery

  

1.00b

Cesarean

15 (100%)

14 (93.3%)

 

Vaginal

0 (0%)

1 (6.7%)

 

Neonatal sex

  

0.14c

Male

9 (60%)

4 (26.7%)

 

Female

6 (40%)

11 (73.3%)

 

Placenta weight (g)

656.92 ± 96.12

470.67 ± 81.80

1.29 × 10−5 a**

Placenta volume (cm3)

962.34 ± 263.63

631.32 ± 226.61

0.002a*

Average birth weight (g)

(2560 ± 486, 1920 ± 454)e

2253 ± 264

(0.05, 0.02*)a,f

  1. aStudent’s T-test. bMann-Whitney U test. cChi-square test. dFisher’s exact test; *P < 0.001; *P < 0.05. eThe first value is the average birth weight of the sIUGR larger twin, and the second value is the average birth weight of the sIUGR smaller twin. fThe first P-value is the significance of the birth weight difference between the IUGR singleton and the sIUGR larger twin; the second value is the significance of the birth weight difference between IUGR singleton and the sIUGR smaller twin.
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