Table 3. Patients’ sociodemographic and clinical characteristics at baseline.
| Categories | Patients (n = 61) |
|---|---|
| Gender: | |
| • Male | 31 |
| • Female | 30 |
| Age (mean, SD) | 51 (15.0) |
| Duration of back pain (n; % of sample): | |
| • > 1 year | 28 (45.9%) |
| • 6–12 months | 5 (8.2%) |
| • 3–6 months | 15 (24.6%) |
| • 4–11 weeks | 5 (8.2%) |
| • 0–4 weeks | 8 (13.1%) |
| BPIa (mean, SD): | |
| • Pain severity | 4.6 (2.2) |
| • Pain interference | 4.6 (2.5) |
| CSIb —total score (mean, SD): | 39.1 (15.2) |
| • Subclinical | 24% |
| • Low | 27% |
| • Moderate | 21% |
| • Severe | 17% |
| • Extreme | 11% |
| PainDetect questionnaire—total score (mean, SD): | 13.4 (6.9) |
| • Nociceptive | 56.5% |
| • Neuropathic | 25.8% |
| • Unsure | 17.7% |
| SBTc —total score (mean, SD): | 3.0 (1.5) |
| • Low risk | 33.3% |
| • Medium risk | 27.4% |
| • High risk | 38.7% |
| OMSPQ-SFd —total score (mean, SD): | 50.9 (15.4) |
| • Below cut-off score (low risk) | 50.0% |
| • Above cut-off score (high risk) | 50.0% |
| Sleep disturbances: | |
| • Nothing to report (‘no’ to both items) | 19.4% |
| • “Often or always” to item 1 of the CSI | 17.7% |
| • Score ≥4 on item 13 of the BPI | 22.6% |
| • “Often or always” to item 1 of the CSI AND Score ≥4 on item 13 of the BPI | 40.3% |
| Mood and/or depressive symptoms: | |
| • Nothing to report (‘no’ to both items) | 41.9% |
| • “Sometimes, often or always” to item 16 of the CSI OR Score >5 on item 6 of the OMSPQ-SF | 38.7% |
| • “Sometimes, often or always” to item 16 of the CSI AND Score >5 on item 6 of the OMSPQ-SF | 19.4% |
aBPI = brief pain inventory
bCSI = central sensitization index
cSBT = start back stool
dOMSPQ-SF = örebro musculoskeletal pain questionnaire