Table 3. Averages of AC parameters of different frequencies and comparative measures for both types of CSOM.

Audiological parameter	CSOM without cholesteatoma (n=47)	CSOM with cholesteatoma (n=31)	t	P
AC-LF (dB)	59.04±11.40	58.48±13.96	0.20	0.843
AC-MF (dB)	41.60±13.80	52.63±15.21	3.32	0.001
AC-HF (dB)	43.24±17.85	55.81±17.82	3.04	0.003

The results are shown as the mean ± standard deviation. AC, air conduction; CSOM, chronic suppurative otitis media; LF, low frequency; MF, middle frequency; HF, high frequency; t, t-score.