Table 2.
Results Obtained for FrEquation 1 (Higher) and 2 (Lower) Relative Frequencies, Stimulus Levels, and ABR Metrics Obtained at Each Treatment Interval for Participants with or without ASHA-Criterion Hearing Shift
| No ASHA Significant Hearing Change
|
ASHA Significant Change
|
Measurement Failure Rate (%) | |||||
|---|---|---|---|---|---|---|---|
| Freq (kHz) | Stimulus Level (dB peSPL) | Metric | N (%) | Mean [lat (msec)or amp (nV)] | N (%) | Mean [lat (msec) or amp (nV)] | |
| 1 | 95 | Change in Latency (CLat1/95) | 9 | −0.05 | 12 | 0.12 | 52 |
| Change in Amplitude (CAmp1/95) | 9 | 25.86 | 12 | −13.61 | 52 | ||
| Loss of Response (LoR1/95) | 12 | 0.25 | 18 | 0.33 | 20 | ||
| 105 | Change in Latency (CLat1/105) | 27 | −0.26 | 23 | −0.05 | 18 | |
| Change in Amplitude (CAmp1/105) | 27 | 1.40 | 23 | 8.43 | 18 | ||
| Loss of Response (LoR1/105) | 29 | 0.07 | 25 | 0.08 | 14 | ||
| 2 | 95 | Change in Latency (CLat2/95) | 18 | 0.12 | 20 | 0.29 | 32 |
| Change in Amplitude (CAmp2/95) | 18 | 20.01 | 20 | 20.64 | 32 | ||
| Loss of Response (LoR2/95) | 24 | 0.25 | 23 | 0.13 | 19 | ||
| 105 | Change in Latency (CLat2/105) | 13 | 0.06 | 24 | −0.01 | 26 | |
| Change in Amplitude (Camp2/105) | 13 | 10.01 | 24 | 57.55 | 26 | ||
| Loss of Response (LoR2/105) | 17 | 0.24 | 24 | 0.00 | 22 | ||
| Latency Increase ≥ 0.3 msec (Lat Inc) | 31 | 0.03 | 26 | 0.27 | 11 | ||
| Any Loss of Response (Any Loss) | 33 | 0.33 | 26 | 0.27 | 10 | ||
Note: ABR measurement failure rates are also noted (stimulus level in dB peSPL; latency in milliseconds, and amplitude in nanovolts).