From: Rasch analysis of the living with chronic illness scale in Parkinson’s disease
Ideal values | Acceptance | Coping | Self-management | Integration | Adjustment to the disease | ||
---|---|---|---|---|---|---|---|
Number of items | 3 | 6a | 4 | 4 | 6 | ||
Item residual | Mean | 0 | 0.175 | 0.366 | 0.283 | 0.238 | 0.795 |
SD | 1 | 1.011 | 1.248 | 1.358 | 1.203 | 1.149 | |
Person residual | Mean | 0 | −0.209 | −0.565 | 0.972 | 0.748 | 0.249 |
SD | 1 | 2.167 | 1.577 | 1.688 | 1.562 | 1.141 | |
Chi-square | Value | 17.296 | 33.471 | 29.21 | 28.232 | 43.206 | |
Prob. | > 0.05/number of items | 0.134 | 0.015 | 0.0006 | 0.0297 | 0.000146 | |
PSI | > 0.70 | 0.798 | 0.765 | 0.67 | 0.728 | 0.663 | |
Unidimensional test CI test Binomial | (LCI < 0.05) | 0.0401 (0.016, 0.064) | 0.0216 (−0.002, 0.045) | 0.0185 (−0.005, 0.042) | 0.0401 (0.016–0.64) | 0.0154 (− 0.008, 0.039) |