Table 7: AB Gap IN dB before and Sixth Month after Myringoplasty.  
Group 1 (n = 60) 
Group 2 (n = 60) 
P Value 

Preoperative AB gap 
32.44 ± 8.18 
26.94 ± 6.8 
0.026 
Postoperative AB gap 
14.44 ± 3.857 
13.24 ± 6.02 
0.45 
AB gap difference 
−18 ± 7.156 
−13.17 ± 5.708 
0.042 