Table 4 Reliability and internal consistency of the Barthel index (n = 27)
Reliability and internal consistency | Values |
|---|---|
Examiner 1 | |
Mean (standard deviation) of the test | 79.25 (33.90) |
Mean (standard deviation) of the retest | 80.74 (34.63) |
Examiner 2 | |
Mean (standard deviation) of the test | 79.62 (34.30) |
Mean (standard deviation) of the retest | 81.11 (34.92) |
Test–retest reliability | |
ICC | 0.962 |
95% CI | 0.918 to 0.982 |
SEM (score) | 6.68 |
SEM (%) | 8.35 |
MDD (score) | 18.51 |
MDD (%) | 23.14 |
CV (%) | 3.99 |
Inter-rater reliability | |
ICC | 0.990 |
95% CI | 0.978 to 0.995 |
SEM (score) | 3.41 |
SEM (%) | 4.29 |
MDD (score) | 9.45 |
MDD (%) | 11.90 |
CV (%) | 2.49 |
Internal consistency | |
Cronbach’s alpha | 0.942 |