Table 1. Differences in age and hearing ability between the two groups

	Air condcution (SD)	Bone condcution (SD)
Normal	6.46 (3.184)	6.20 (3.156)
Unilateral COM	8.51 (4.050)	8.32 (4.253)
t-value	−2.421	−2.435

SD: standard deviation, COM: chronic otitis media.