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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 IGroup IIGroup IIIGroup IVTotal
10–20 dBN2119241882
20–30 dBN2425182188
TotalN45444239170
Chi-squareχ21.897
P value0.594