Table 2.
Pittsburgh Sleep Quality Indexa as a function of the French version of the Dallas Pain Questionnaireb
| Dallas Pain Questionnaireb | Patients with chronic low back pain–mild impact (0–33%) | Patients with chronic low back pain–moderate impact (33–66%) | Patients with chronic low back pain–great impact (66–100%) | P value |
|---|---|---|---|---|
| Daily activities | 5.5 (0.7) | 9.1 (4.6) | 12.8 (4.5) | P < 0.001 |
| Work and leisure | 6.3 (1.5) | 8.6 (4.4) | 13.8 (4.0) | P < 0.001 |
| Anxiety-depression | 8.3 (4.1) | 11.6 (4.2) | 15.3 (3.5) | P < 0.001 |
| Social interest | 8.6 (4.3) | 12.4 (4.3) | 16.1 (3.8) | P < 0.001 |
aValue between 0 (no difficulty) and 21 (severe difficulty)
bEach dimension score ranging from 0 (no impact) to 100 (maximal impact)