Table 7.
Distribution‐based measures of responder definitions for the CAJAS total and joint subscale scores
| Baseline SD | α coefficient | 0.5 SD | SEM | MDC90 |
RD 1a (Lower) |
RD 2a (Higher) |
|
|---|---|---|---|---|---|---|---|
| Total | 3.57 | 0.91 | 1.79 | 1.07 | 2.41 | 1.0 | 1.5 |
| Ankle | 3.83 | 0.85 | 1.92 | 1.48 | 2.84 | 1.5 | 2.0 |
| Elbow | 3.61 | 0.82 | 1.81 | 1.53 | 2.89 | 1.5 | 2.0 |
| Knee | 5.10 | 0.89 | 2.55 | 1.69 | 3.03 | 1.5 | 2.0 |
Abbreviations: CAJAS, Colorado Adults Joint Assessment Scale; MDC90, minimal detectable change based on 90% confidence level; RD, responder definition; SD, standard deviation; SEM, standard error of mean.
a
RD 1 obtained with reference to SEM; RD 2 with reference to 0.5 SD.