Table 2.
Descriptive statistics and reliability of PDQ-39 scales
| PDQ-39 scale | Mean (SD) | 95% CI | Cronbach’s a | Item-test correlation | Intraclass correlation coefficient (ICC) |
|---|---|---|---|---|---|
| Mobility | 44.5 (23.1) | 41.0-47.6 | 0.91 | 0.79 | 0.90 |
| ADL* | 39.1 (22.3) | 35.2-42.0 | 0.88 | 0.83 | 0.47 |
| Emotions | 37.2 (21.0) | 32.8-39.1 | 0.86 | 0.84 | 0.78 |
| Stigma | 33.9 (25.1) | 29.8-37.4 | 0.87 | 0.73 | 0.82 |
| Social | 22.9 (20.4) | 20.0-26.0 | 0.70 | 0.78 | 0.77 |
| Cognitions | 28.8 (16.8) | 27.0-32.2 | 0.60 | 0.79 | 0.84 |
| Communication | 28.1 (21.0) | 25.1-31.5 | 0.78 | 0.79 | 0.74 |
| Body pain | 42.0 (23.5) | 38.5-45.9 | 0.75 | 0.76 | 0.75 |
| PDSI** | 35.1 (15.4) | 23.1-36.7 | 0.93 | ---- | 0.80 |
*
Activities of daily living
**
Parkinson’s disease summary index