Table 2.
Summary of the 20 Hearing Aid Outcome Measures in the IU-1 Study
| Outcome Category | Variable | Description |
|---|---|---|
| Hearing Aid Usage | HDABI-use | Mean frequency of hearing-aid usage, 14 situations |
| GHABP-use | Mean frequency of hearing-aid usage, 4 situations | |
| Daily use | Mean hours per day hearing-aid usage from daily diary | |
| Subjective Benefit | HAPI-spn | Mean score for speech-in-noise HAPI subscale |
| HAPI-spq | Mean score for speech-in-quiet HAPI subscale | |
| HAPI-red-cues | Mean score for HAPI subscale, speech with reduced cues | |
| HAPI-nonspeech | Mean score for HAPI subscale, non-speech sounds | |
| HDABI-ben | Mean helpfulness of hearing aids, 14 listening situations | |
| GHABP-ben | Mean helpfulness of hearing aids, 4 listening situations | |
| GHABP-perf | Mean aided performance rating of hearing aids, 4 situations | |
| Satisfaction | MarkeTrakIV* | Mean satisfaction rating on 28 items, 5-point scale |
| GHABP-sat | Mean satisfaction rating, 4 listening situations | |
| Speech Recognition | NST-unaided | Percentage correct on NST, 65 dB SPL, +8 dB SNR, unaided |
| NST-aided | Percentage correct on NST, 65 dB SPL, +8 dB SNR, aided | |
| CST50-unaided | Percentage correct on CST, 50 dB SPL, in quiet, unaided | |
| CST65-unaided | Percentage correct on CST, 65 dB SPL, +8 dB SNR, unaided | |
| CST80-unaided | Percentage correct on CST, 80 dB SPL, 0 dB SNR, unaided | |
| CST50-aided | Percentage correct on CST, 50 dB SPL, in quiet, aided | |
| CST65-aided | Percentage correct on CST, 65 dB SPL, +8 dB SNR, aided | |
| CST80-aided | Percentage correct on CST, 80 dB SPL, 0 dB SNR, aided |
*
Kochkin, 1997; HDABI, Hearing Disability and Benefit Inventory (Gatehouse, 1999); GHABP, Glasgow Hearing Aid Benefit Profile (Gatehouse, 1999); HAPI, Hearing Aid Performance Inventory (Walden et al., 1984); CST, Connected Speech Test (Cox et al., 1988); NST, Nonsense Syllable Test (Levitt and Resnick, 1978); IU, Indiana University.