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The Egyptian Journal of Otolaryngology

Table 2 Preoperative ABG for patients with successfully taken grafts

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

ABG (pre)

Groups

Group I

Group II

Group III

Group IV

Total

10–20 dB

N

21

19

24

18

82

20–30 dB

N

24

25

18

21

88

Total

N

45

44

42

39

170

Chi-square

χ2

1.897

P value

0.594

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