3.2.2 Comparison of hearing performance in the two groups
The mean ABG values in the TF and FTTC group were 13.75 (8.75–16.25) dB and 10 (6.25–15) dB, respectively; no significant difference was observed in the mean ABG of the two groups (Z = -1.051, P = .293, Figure 3A.). Further, the ABGs at 250 Hz, 500 Hz, 1000 Hz, 2000 Hz, and 4000 Hz in the two groups were compared; for each frequency, no significant difference was observed between the two groups (P> .05, Table 1).