Research Article
Validation of Revised Chinese Version of PD-CRS in Parkinson’s Disease Patients
Table 2
Reliability and internal consistency for both total and individual item scores of PD-CRS.
| Subscale | Test-retest reliability | Inter-rater reliability | Internal consistency | ICC (95% CI) | | ICC (95% CI) | | Corrected item − total correlation | Cronbach’s alpha if the item is deleted |
| Immediate free-recall verbal memory | 0.817 (0.747–0.867) | <0.001 | 0.692 (0.580–0.782) | <0.001 | 0.705 | 0.830 | Confrontation naming | 0.717 (0.554–0.844) | <0.001 | 0.709 (0.562–0.807) | <0.001 | 0.452 | 0.837 | Sustained attention | 0.810 (0.743–0.867) | <0.001 | 0.775 (0.667–0.857) | <0.001 | 0.704 | 0.829 | Working memory | 0.706 (0.571–0.808) | <0.001 | 0.650 (0.521–0.759) | <0.001 | 0.602 | 0.835 | Clock drawing | 0.728 (0.506–0.851) | <0.001 | 0.675 (0.449–0.822) | <0.001 | 0.629 | 0.834 | Copying a clock | 0.814 (0.423–0.925) | <0.001 | 0.826 (0.429–0.922) | <0.001 | 0.566 | 0.838 | Delayed free-recall verbal memory | 0.825 (0.743–0.894) | <0.001 | 0.748 (0.614–0.845) | <0.001 | 0.665 | 0.829 | Alternating verbal fluencies | 0.727 (0.608–0.815) | <0.001 | 0.592 (0.471–0.693) | <0.001 | 0.730 | 0.822 | Action verbal fluencies | 0.691 (0.562–0.796) | <0.001 | 0.720 (0.596–0.821) | <0.001 | 0.711 | 0.821 | Frontal-subcortical functions | 0.911 (0.865–0.939) | <0.001 | 0.893 (0.841–0.929) | <0.001 | 0.977 | 0.787 | Instrumental-cortical functions | 0.780 (0.632–0.870) | <0.001 | 0.789 (0.655–0.872) | <0.001 | 0.645 | 0.829 | PD-CRS | 0.906 (0.860–0.935) | <0.001 | 0.899 (0.848–0.933) | <0.001 | Cronbach’s alpha = 0.840 |
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PD-CRS: Parkinson’s disease-cognitive rating scale; ICC: intraclass correlation coefficients; CI: confidence interval.
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