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Table 4 The comparison between different groups as regards improvement of hearing

From: Do mastoidectomy and type of graft affect tympanoplasty outcome in Egyptian children? A prospective randomized study

Groups

Improved hearing

Chi-square

Yes

No

Total

N

%

N

%

N

%

χ2

P value

I

41

91.11

4

8.89

45

26.47

29.889

< 0.001*

II

32

72.73

12

27.27

44

25.88

III

21

50.00

21

50.00

42

24.71

IV

37

94.87

2

5.13

39

22.94

Total

131

77.06

39

22.94

170

100.00

I + IV

78

92.86

6

7.14

84

49.41

21.710

< 0.001*

II + III

53

61.63

33

38.37

86

50.59

Total

131

77.06

39

22.94

170

100.00

I + II

73

82.02

16

17.98

89

52.35

2.047

0.152

III + IV

58

71.60

23

28.40

81

47.65

Total

131

77.06

39

22.94

170

100.00

  1. *means (statistically significant)