Table 3 Pearson item-total correlation coefficients of the ICDSC (n = 77 patients; 507 test occasions)
ICDSC items | Corrected item-total correlations | Total alpha if item is deleted |
|---|---|---|
Item 1 “Altered level of consciousness” | 0.638 | 0.811 |
Item 2 “Inattention” | 0.586 | 0.819 |
Item 3 “Disorientation” | 0.588 | 0.819 |
Item 4 “Hallucination, delusion, psychosis” | 0.507 | 0.829 |
Item 5 “Psychomotor agitation or retardation” | 0.661 | 0.808 |
Item 6 “Inappropriate speech or mood” | 0.575 | 0.822 |
Item 7 “Sleep/wake cycle disturbance” | 0.469 | 0.837 |
Item 8 “Symptom fluctuation” | 0.604 | 0.816 |