Table 3 Comparison of fetal and neonatal mortality and morbidity among three study groups in twins in United States

53.5 (53.2 – 53.8)

57.8 (56.0 – 59.7)*

1.08

59.6 (58.9 – 60.3)*

1.11

8.26 (8.10 – 8.41)

10.9 (9.72 – 12.0)*

1.32

12.9 (12.4 – 13.4)*

1.56

51.4 (51.1 – 51.7)

60.0 (58.2 – 61.7)*

1.17

64.6 (63.9 – 65.3)*

1.26

3.23 (3.13 – 3.32)

5.14 (4.35 – 5.92)*

1.59

6.45 (6.11 – 6.79)*

2.00

0.85 (0.81 – 0.89)

3.28 (2.65 – 3.90)*

3.86

1.59 (1.43 – 1.75)*

1.87

1.92 (1.85 – 2.00)

3.83 (3.12 – 4.53)*

1.99

3.90 (3.62 – 4.17)*

2.03

0.46 (0.43 – 0.50)

0.95 (0.59 – 1.32)*

2.07

1.12 (0.97 – 1.27)*

2.43

0.40 (0.36 – 0.43)

0.35 (0.13 – 0.57)

0.88

0.46 (0.36 – 0.55)

1.15

0.16 (0.14 – 0.18)

0.18 (0.02 – 0.33)

1.13

0.17 (0.11 – 0.23)

1.06

3.28 (3.18 – 3.38)

2.88 (2.27 – 3.49)

0.88

3.87 (3.60 – 4.14)*

1.18

0.09 (0.07 – 0.11)

0.11 (0.01 – 0.22)

1.22

0.09 (0.05 – 0.13)

1.00

3.45 (3.35 – 3.55)

2.67 (2.08 – 3.26)*

0.77

3.87 (3.60 – 4.14)*

1.12

3.82 (3.71 – 3.92)

3.23 (2.58 – 3.88)

0.85

5.04 (4.73 – 5.35)*

1.32

0.07 (0.05 – 0.08)

0.18 (0.02 – 0.33)

2.57

0.10 (0.06 – 0.15)

1.43

0.15 (0.13 – 0.18)

0.20 (0.04 – 0.36)

1.33

0.14 (0.09 – 0.19)

0.93

0.43 (0.39 – 0.46)

0.60 (0.32 – 0.87)

1.40

0.45 (0.36 – 0.54)

1.05

0.11 (0.09 – 0.13)

0.17 (0.02 – 0.31)

1.55

0.11 (0.07 – 0.16)

1.00

0.21 (0.19 – 0.24)

0.23 (0.06 – 0.40)

1.10

0.17 (0.11 – 0.23)

0.81

0.38 (0.34 – 0.41)

0.43 (0.20 – 0.66)

1.13

0.40 (0.31 – 0.49)

1.05

0.10 (0.09 – 0.12)

0.17 (0.02 – 0.31)

1.70

0.08 (0.04 – 0.12)

0.80