Internal consistency of different subdimensions and total health assessment questionnaire (HAQ)
| Subdimension | Number of items | Mean (range) | α† | 95% CI‡ |
|---|---|---|---|---|
| †Cronbach’s α with ‡one sided (lower limit) confidence interval. | ||||
| 1. Dressing and grooming | 2 | 0.82 (0 to 3) | 0.73 | 0.68 |
| 2. Arising | 2 | 0.87 (0 to 3) | 0.76 | 0.71 |
| 3. Eating | 3 | 0.99 (0 to 3) | 0.84 | 0.81 |
| 4. Walking | 2 | 0.73 (0 to 3) | 0.82 | 0.78 |
| 5. Hygiene | 3 | 1.00 (0 to 3) | 0.75 | 0.70 |
| 6. Reach | 2 | 1.04 (0 to 3) | 0.71 | 0.65 |
| 7. Grip | 3 | 0.87 (0 to 3) | 0.77 | 0.73 |
| 8. Common daily activities | 3 | 1.03 (0 to 3) | 0.81 | 0.78 |
| Total HAQ | 8 | 0.92 (0 to 2.88) | 0.91 | 0.89 |