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Comparison of average BC gain among the four groups.
| Average BC gain | Group 1 | Group 2 | Group 3 | Group 4 | p |
|---|---|---|---|---|---|
| 500 Hz (DS) | 8.50 dB (6.68) | 5.24 dB (7.50) | 6.84 dB (9.01) | 4.12 dB (5.6) | 0.200 |
| 1000 Hz (DS) | 8.52 dB (5.1) | 6.2 dB (7.8) | 7.63 dB (10.45) | 4.8 dB (4.49) | 0.400 |
| 2000 Hz (DS) | 12.50 (6.52) | 9.24 dB (11,27) | 9.42 dB (10.67) | −2 dB (4.32) | 0,008 |
| 4000 Hz (DS) | 5.50 dB (7.97) | 4.39 dB (8.34) | 9.47 dB (12.8) | 1.2 dB (3.2) | 0,050 |
SD: Standard deviation.
