Research Article
Item Selection for a New Health-Related Quality of Life Measure for Parkinson’s Disease: The Preference-Based Parkinson’s Disease Index (PB-PDI)
Table 2
Impact score of each item on the PB-PDI (n = 53) for those scoring a level 2 or higher.
| Item | % scoring a level 2+ | Mean (SD) importance rating for level 2+ | Mean impact score |
| Sleep | 81.1 | 4.3 (0.8) | 3.5 | Fatigue | 77.4 | 4.1 (0.8) | 3.2 | Tremor | 79.2 | 4.0 (1.1) | 3.2 | Mood | 62.3 | 4.1 (0.8) | 2.6 | Walking | 56.6 | 4.3 (0.6) | 2.4 | Memory | 60.4 | 4.0 (0.9) | 2.4 | Dexterity | 64.2 | 3.5 (1.1) | 2.2 | Urine control | 52.8 | 3.9 (0.9) | 2.1 | Concentration | 49.1 | 3.9 (0.9) | 1.9 | Speech | 35.8 | 4.3 (0.7) | 1.5 | Freezing | 34.0 | 4.4 (0.9) | 1.5 | Swallowing | 22.6 | 4.0 (1.0) | 0.9 |
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Impact = (% scoring a level 2+) (mean importance rating for level 2+)/100. SD, standard deviation. |