Table 1 Intraclass correlation coefficients and 95% confidence intervals for the consistency of health-related quality-of-life ratings over time and level of agreement between raters, according to health state
| Â | Current health state | Mild to moderate stroke | Incurable brain cancer | Severe dementia |
|---|---|---|---|---|
Consistency over timea | ||||
 Older adults | 0.55 | 0.41 | 0.39 | 0.49 |
(0.47, 0.63) | (0.32, 0.50) | (0.30, 0.48) | (0.40, 0.57) | |
 Proxies | 0.55 | 0.27 | 0.28 | 0.20 |
(0.46, 0.62) | (0.16, 0.37) | (0.14, 0.41) | (0.11, 0.30) | |
Agreement between ratersb | ||||
 T0 | 0.44 | 0.16 | 0.19 | 0.12 |
(0.33, 0.53) | (0.04, 0.28) | (0.06, 0.31) | (−0.01, 0.24) | |
 T1 | 0.38 | 0.19 | 0.01 | 0.02 |
(0.25, 0.50) | (0.05, 0.33) | (−0.13, 0.15) | (−0.13, 0.16) | |
 T2 | 0.51 | 0.26 | 0.23 | 0.07 |
(0.40, 0.61) | (0.12, 0.39) | (0.09, 0.36) | (−0.07, 0.22) | |