Table 2.
Mean value for test–retest, mean difference between test and retest, 95% confidence interval (95% CI), intra-class correlation coefficient (ICC2.1), standard error of measure (SEM), coefficient of variance (SEM%), smallest real difference (SRD), smallest real difference % (SRD%), internal consistency (Cronbach’s alpha), Spearman’s correlations between Late-Life Function and Disability Instrument (LLFDI) and Physical Component Score (SF-36 PCS) and LLFDI and Physical Function scale (PF-10).
| Test mean | Retest mean | Diff mean (95% CI) | ICC2.1 | SEM | SEM% | SRD | SRD% | Cronbach’s alpha | SF-36 PCS | PF-10 | |
|---|---|---|---|---|---|---|---|---|---|---|---|
| LLFDI function component | |||||||||||
| Overall score | 58.0 | 57.5 | −0.5 (−0.5 to 1.6) | 0.91 | 2.9 | 5 | 8.0 | 14 | 0.96 | 0.67** | 0.52** |
| Upper extremity function | 72.8 | 70.7 | −2.1 (0.3 to 3.9) | 0.87 | 5.1 | 7 | 14.1 | 20 | 0.94 | 0.39** | 0.35** |
| Basic lower extremity function | 66.4 | 66.0 | −0.4 (−1.2 to 2.0) | 0.89 | 4.4 | 7 | 12.1 | 18 | 0.94 | 0.65** | 0.50** |
| Advanced lower extremity function | 50.2 | 50.2 | −0.0 (−1.6 to 1.6) | 0.91 | 4.3 | 9 | 12.0 | 24 | 0.95 | 0.68** | 0.47** |
| LLFDI disability component | |||||||||||
| Frequency | 52.6 | 52.0 | −0.6 (−0.4 to 1.5) | 0.82 | 2.6 | 5 | 7.2 | 14 | 0.90 | 0.40** | 0.34** |
| Limitations | 73.6 | 72.7 | −0.9 (−0.7 to 2.5) | 0.91 | 4.1 | 6 | 11.4 | 16 | 0.95 | 0.63** | 0.57** |
**
Correlation is significant at the 0.01 level.