Table 1.
Patient demographic characteristics and clinical status
| Validity study (n = 90) | Test–retest study (n = 61) | |
|---|---|---|
| Sex (female, no) (%) | 52 (57.8) | 32 (52.5) |
| Age in years (mean (SD)) | 47.6 ± 11.7 | 49.2 ± 11.2 |
| Recruited from (no, %) | ||
| Primary health care physiotherapy | 30 (33.3) | 14 (23.0) |
| Outpatient rehab clinic | 24 (26.7) | 22 (36.1) |
| Orthopaedic dept university hospital | 30 (33.3) | 21 (34.4) |
| Pain clinic university hospital | 6 (6.7) | 4 (6.6) |
| Employment status (no, %) | ||
| Working | 40 (44.4) | 24 (39.3) |
| Sick listed | 18 (20.0) | 15 (24.6) |
| Pension (disability, retirement) | 25 (27.8) | 18 (29.5) |
| Former back surgery (yes, no, %) | 33 (36.7) | 23 (37.7) |
| Duration current episode (all) (weeks) (mean (SD)) | 503 ± 683 | 572 ± 689 |
| <3 months (no, %) | 19 (21.1) | 11 (18.0) |
| >3 months (no, %) | 71 (78.9) | 50 (82.0) |
| Back pain (NRS) (0–10) (mean (SD)) | 4.8 ± 2.1 | 4.9 ± 2.1 |
| Disability (RMDQ) (0–24) (mean (SD)) | 7.6 ± 5.2 | 7.2 ± 5.1 |
| HSCL-25 (1–4) (mean (SD)) | 1.61 ± 0.49 | 1.64 ± 0.49 |
| EQ-5D (mean (SD))a | 0.54 ± 0.31 | 0.55 ± 0.29 |
NRS numeric rating scale, RMDQ Roland–Morris disability questionnaire, HSCL-25 Hopkins symptom check list
aHigher score indicate better health