Table 3 Mean differences from linear regression analysesa of selected pain and work related variables between Start Back risk groups (work related variables analyzed only on people in work, and higher scores represent worse problems)
From: Risk classification of patients referred to secondary care for low back pain
STarT Back risk group | |||
|---|---|---|---|
Low risk | Medium risk | High risk | |
Pain | |||
Intensity last week, 1–10 points | |||
Mean (SD) | 3.8 (2.0) | 5.1 (2.5) | 5.7 (2.7) |
Difference (95% CI) | 0.0 (reference) | 1.2 (0.3–2.1) | 1.9 (0.8–2.9) |
Intensity past 3 months, 1–10 points | |||
Mean (SD) | 6.0 (1.5) | 6.9 (1.5) | 7.9 (1.5) |
Difference (95% CI) | 0.0 (reference) | 1.0 (0.4–1.5) | 1.9 (1.2–2.6) |
Duration, weeks | |||
Median (IQR) | 46 (20–52) | 52 (33–52) | 52 (47–52) |
Difference (p-value) | 0 (reference) | 8 (0.007) | 8 (0.004) |
Work | |||
Missed days of work, passed 18 months | |||
Median (IQR) | 11 (0–137) | 30 (5–137) | 137 (60–365) |
Difference (p-value) | 0 (reference) | 19 (0.14) | 126 (0.001) |
Heavy / monotoneous work, 1–10 points | |||
Median (IQR) | 5 (3–7) | 7 (5–8) | 8 (6–9) |
Difference (p-value) | 0 (reference) | 2 (0.02) | 3 (0.004) |
Workable in six months, 1–10 points | |||
Median (IQR) | 1 (0–5) | 2 (0–5) | 6 (2–9) |
Difference (p-value) | 0 (reference) | 1 (0.13) | 5 (< 0.001) |
Job satisfaction, 1–10 points | |||
Median (IQR) | 2 (1–4) | 2 (1–5) | 3 (1–5) |
Difference (p-value) | 0 (reference) | 0 (0.23) | 1 (0.17) |
Should not work (fear), 1–10 points | |||
Median (IQR) | 4 (0–6) | 5 (3–9) | 10 (6–10) |
Difference (p-value) | 0 (reference) | 1 (0.01) | 6 (< 0.001) |