Table 4.
Standard error of measurement (SEM) and smallest detectable change (SDC) for the three instrumentsa (n = 182)
| Instrument | n | Test mean (SD) | Retest mean (SD) | SEMb | SDCcindividual | SDCcgroup |
|---|---|---|---|---|---|---|
| LEFS (0–80)c | 179 | 68.54 (15.03) | 69.03 (15.14) | 4.50 | 12.49 | 0.93 |
| LEFS adjusted | 181 | 85.48 (18.39) | 86.19 (18.41) | 5.61 | 15.55 | 1.16 |
| SEFAS (12–60)b | 172 | 19.70 (8.99) | 19.49 (9.23) | 2.39 | 6.62 | 0.50 |
| SEFAS adjusted | 182 | 83.85 (18.52) | 84.11 (19.01) | 5.09 | 14.10 | 0.93 |
| OMAS | 140 | 78.04 (24.44) | 79.64 (24.29) | 6.87 | 19.04 | 0.92 |
| OMAS adjusted | 176 | 77.66 (24.38) | 78.85 (23.90) | 7.41 | 20.55 | 1.55 |
aInstruments scored 0–100 unless otherwise stated
bStandard error of measurement
cSmallest detectable change
bIncluded for comparison with existing studies that have used the same scoring