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Mean changesa in pure-tone thresholds, in dB.
| 250 Hz | 500 Hz | 1000 Hz | PTA (dB HL)b | |
|---|---|---|---|---|
| Pre-op(+/- SDc) | 63.4 (25.6) | 75.2 (20.0) | 95.2 (9.3) | 77.3 (15.85) |
| Post-op(+/-SD) | 81.9 (23.7) | 96.6 (18.9) | 109.4 (11.2) | 95.8 (17.4) |
| Change | 18.9 | 21.2 | 14.2 | 18.5 |
Mean thresholds and PTA were calculated by inserting n +5 dB for no response, where n is the maximum output of the audiometer at a given frequency,
PTA was calculated as the average of 250, 500, and 1000 Hz.
SD is standard deviation
