Table 2 The obstetric outcomes after reduction according to chorionicity

Total number

112

49

/

/

/

PPROM^a

3 (2.7)

1 (2.0)

1.000

1.321

0.134–13.026

Preterm Labour

33 (29.5)

26 (53.1)

0.004

0.370

0.185–0.739

Mean GA at delivery (weeks)

36.9 ± 4.0

33.5 ± 6.6

0.001

/

1.379–5.418

GA at birth 24–27 6/7

2 (1.8)

4 (8.2)

0.130

0.205

0.036–1.157

28–31 6/7 weeks

6 (5.4)

5 (10.2)

0.434

0.498

0.144–1.717

32–33 6/7 weeks

2 (1.8)

4 (8.2)

0.130

0.205

0.036–1.157

34–36 6/7 weeks

20 (17.9)

6 (12.2)

0.373

1.558

0.584–4.158

≥37 weeks

79 (70.5)

23 (46.9)

0.004

2.706

1.354–5.410

Foetal survival rate

107 (95.5)

38 (77.6)

0.001

6.195

2.021–18.987

Foetal survival rate (excluding TTTS)^b

107 (95.5)

25/29 (86.2)

0.160

3.424

0.857–13.678

SGA^c

5 (4.5)

5 (10.2)

0.301

0.411

0.113–1.491

Perinatal mortality

2 (1.8)

4 (8.2)

0.130

0.205

0.036–1.157

Cotwin death ≤1 week after reduction

0 (0.0)

1 (2.0)

0.304

1.021

0.980–1.063

Cotwin death > 1 week after reduction

0 (0.0)

3 (6.1)

0.027

1.065

0.992–1.144

GDM^c

16 (14.3)

5 (10.2)

0.479

1.467

0.505–4.258

HDP^c

8 (7.1)

4 (8.2)

1.000

0.865

0.248–3.021