Table 2
Baseline physical (self-reported) and MRI characteristics of participants
| Physical Characteristics (Denominatora) | n = 609 |
|---|---|
| Pain and function | |
| RMDQ disability score (0–23) (609), mean (SD) | 12.7 (5.7) |
| Back pain intensity (609), mean (SD) | 5.6 (2.2) |
| Leg pain intensity (608), mean (SD) | 5.2 (2.4) |
| Pain below knee (584) | 394 (67.5) |
| Leg pain worse than back pain (609) | 280 (46.0) |
| Sleep disturbance due to back/leg painb(609) | 428 (70.3) |
| First ever episode of back/leg pain (609) | 58 (9.5) |
| Duration of symptoms | |
| Back pain current episode (607) | |
| Less than 6 weeks | 218 (35.9) |
| 6–12 weeks | 126 (20.8) |
| >3 months | 263 (43.3) |
| Leg pain current episode (583) | |
| Less than 6 weeks | 251 (43.1) |
| 6–12 weeks | 120 (20.6) |
| >3 months | 212 (36.4) |
| Start Back prognostic risk score (589) | |
| Low Risk | 82 (13.9) |
| Medium Risk | 276 (46.9) |
| High Risk | 231 (39.2) |
| Sciatica Bothersomeness Index (SBI), mean (SD) | |
| Leg pain (583) | 4.3 (1.5) |
| Numbness or tingling in leg, foot or groin (583) | 3.2 (2.1) |
| Weakness in leg or foot (582) | 2.6 (2.1) |
| Back or leg pain while sitting | 4.1 (1.6) |
| Composite score (582) | 14.2 (5.4) |
| S-LANSS; neuropathic pain score (>12) (607) | 293 (48.1) |
| Imaging(553) | |
| Positive MRI findings for nerve root compression | 297 (53.7) |
aDenominator varies for some participants due to missing data or not applicable case
bInformation on back and/or leg pain associated sleep disturbance was collected as part of the clinical assessment (yes/no category)