Table 3.
Descriptive data and distribution of responses for each item in the NDI–DLV (n = 112) and Spearman correlations between item score and total score
| Item | Present study mean (SD) | % Individuals with lowest score | % Individuals with highest score | Numbers of missing | Item–total Correlation |
|---|---|---|---|---|---|
| 1. Pain | 2.2 (0.8) | 0 | 1 | 1 | 0.48 |
| 2. Personal Care | 0.7 (0.8) | 44 | 0 | 1 | 0.50 |
| 3. Lifting | 2.3 (1.3) | 5 | 2 | 1 | 0.50 |
| 4. Reading | 2.4 (1.0) | 6 | 0 | 1 | 0.40 |
| 5. Headaches | 2.8 (1.6) | 13 | 19 | 1 | 0.54 |
| 6. Concentration | 2.0 (1.3) | 12 | 2 | 2 | 0.53 |
| 7. Work | 2.5 (1.2) | 9 | 6 | 2 | 0.55 |
| 8. Driving | 2.4 (1.2) | 8 | 3 | 2 | 0.48 |
| 9. Sleeping | 1.9 (1.3) | 19 | 1 | 2 | 0.56 |
| 10. Recreation | 2.4 (1.0) | 3 | 1 | 2 | 0.64 |
All correlations significant at the 0.01 level (2-tailed)