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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

GroupsImproved hearingChi-square
YesNoTotal
N%N%N%χ2P value
I4191.1148.894526.4729.889< 0.001*
II3272.731227.274425.88
III2150.002150.004224.71
IV3794.8725.133922.94
Total13177.063922.94170100.00
I + IV7892.8667.148449.4121.710< 0.001*
II + III5361.633338.378650.59
Total13177.063922.94170100.00
I + II7382.021617.988952.352.0470.152
III + IV5871.602328.408147.65
Total13177.063922.94170100.00
  1. *means (statistically significant)
\