Table 3 Comparing risk factors for retinopathy of prematurity (ROP) in singleton and multiple birth neonates with different severity of ROP

Gestational age

(weeks)

Singles

34.73 ± 2.28

< 0.001

32.84 ± 2.54

0.027

27.50 ± 3.27

0.032

Twins

33.42 ± 1.31

33.00 ± 2.10

30.00 ± 2.00

Triplets

32.90 ± 1.58

32.16 ± 1.61

31.14 ± 0.38

Birth weight (grams)

Singles

2324.79 ± 667.54

< 0.001

1926.85 ± 556.88

< 0.001

861.67 ± 274.62

0.002

Twins

1939.52 ± 349.37

1781.14 ± 357.62

1233.33 ± 347.75

Triplets

1694.27 ± 337.28

1598.23 ± 302.72

1537.14 ± 208.86

Duration of NICU admission (days)

Singles

9.36 ± 8.77

0.005

15.71 ± 14.16

0.191

60.17 ± 21.36

< 0.001

Twins

8.06 ± 7.60

12.96 ± 10.00

34.00 ± 12.17

Triplets

12.57 ± 10.86

15.89 ± 10.10

12.00 ± 6.32

Duration of oxygen support (days)

Singles

5.01 ± 4.98

0.380

6.44 ± 7.06

0.441

47.33 ± 16.57

0.001

Twins

4.03 ± 5.34

6.54 ± 7.39

36.00 ± 8.49

Triplets

3.98 ± 3.93

8.06 ± 6.87

4.60 ± 2.41