Table 2.
Smallest Detectable Change (SDC) and Standard Error of Measurement (SEM) for Tinnitus Functional Index (TFI/TFI-22) scores between three administrations.
| Mean (±SD) | Difference | Measurement Error | |||||||
|---|---|---|---|---|---|---|---|---|---|
| Scale | n | T0 | T1 | T2 | Mean Diff | SD Diff | SEM | SEM × 4 | SDC |
| TFI-25 | 50 | 50.8 (±25.1) | 45.9 (±22.8) | 44.9 (±23.1) | −5.4 | 7.2 | 5.1 | 20.4 | 14.2 |
| TFI-22 | 50 | 51.3 (±25.9) | 45.7 (±23.3) | 45.0 (±23.7) | −5.9 | 7.1 | 5.0 | 20.0 | 13.9 |
| INT | 46 | 64.0 (±24.3) | 55.6 (±23.2) | 54.7 (±23.3) | −9.8 | 13.2 | 9.3 | 37.2 | 25.8 |
| SOC | 48 | 61.9 (±24.3) | 56.5 (±24.2) | 55.0 (±24.0) | −6.2 | 10.7 | 7.6 | 30.4 | 21.0 |
| COG | 49 | 40.9 (±28.4) | 39.3 (±27.2) | 38.0 (±26.0) | −2.2 | 13.5 | 9.6 | 38.4 | 26.5 |
| SLP | 48 | 52.6 (±32.0) | 46.4 (±29.2) | 47.1 (±29.4) | −4.8 | 13.3 | 9.4 | 37.6 | 25.9 |
| AUD | 50 | 47.7 (±30.1) | 47.5 (±28.8) | 44.4 (±28.2) | −1.7 | 16.2 | 10.7 | 42.8 | 29.6 |
| REL | 50 | 62.0 (±29.3) | 55.9 (±26.4) | 53.5 (±27.4) | −7.4 | 14.4 | 10.2 | 40.8 | 28.3 |
| QOL | 49 | 38.6 (±32.4) | 34.7 (±28.9) | 33.3 (±29.0) | −4.6 | 11.3 | 8.0 | 32.0 | 22.2 |
| EMO | 50 | 42.8 (±31.5) | 35.7 (±29.7) | 38.4 (±30.2) | −5.7 | 14.6 | 10.3 | 41.2 | 28.6 |
T0 = Baseline, T1 = 3-month follow-up, T2 = 6-month follow-up; Mean diff = the mean difference scores between administrations; SD diff = Standard Deviation of the difference; SEM = Standard Error in Measurement (SDdiff/√2); SDC = Smallest Detectable Change (1.96 × √2 × SEM). For subscale definitions, please refer to Table 1.