Effective

Non effective

Relative risk

Gender:

Female

Male

41

77

16

16

0.87 [0.73 - 1.03]

Age:

<2 years old

>2 years old

92

26

29

3

0.85 [0.69 - 1.04]

Laterality:

Bilateral

Unilateral

55

63

21

11

0.85 [0.72 - 1.0]

Type:

Idiopathic

Secondary

106

12

31

1

0.84 [0.64 - 1.10]

Pirani score at the beginning:

- Severe ≥ 3.5

- Moderate < 3.5

103

15

30

2

0.88 [0.72 - 0.85]