Table 4 Results of the logistic regression analysis
Descriptor | Variable | Odds ratio (95% CI) | P value | Likelihood ratio test | P of the test |
|---|---|---|---|---|---|
SLR | Intensity of leg pain | 1.3 (1.2–1.4) | 0.000 | 55.2 | 0.000 |
X-rays | Intensity of leg pain | 1.2 (1.0–1.2) | 0.017 | 76.4 | 0.000 |
>2 episodes of low back pain | 1.9 (1.4–2.7) | 0.000 | |||
Disability | 1.1 (1.0–1.1) | 0.002 | |||
Chronicity* | 0.000 | ||||
Subacute | 2.3 (1.5–3.5) | 0.000 | |||
Chronic | 2.7 (1.2–6.1) | 0.022 | |||
SLR | 0.002 | ||||
> 60° | 0.7 (0.4–1.0) | 0.038 | |||
< 60° | 1.5 (1.0–2.2) | 0.085 | |||
CT scan or MRI | Sex (male)* | 1.9 (1.3–3.0) | 0.003 | 93.4 | 0.000 |
Intensity of leg pain | 1.1 (1.1–1.2) | 0.001 | |||
Disability | 1.1 (1.0–1.1) | 0.000 | |||
Chronicity* | 0.000 | ||||
Subacute | 2.7 (1.6–4.5) | 0.000 | |||
Chronic | 5.8 (2.5–13.6) | 0.000 | |||
SLR | 0.002 | ||||
> 60° | 0.7 (0.4–1.3) | 0.230 | |||
< 60° | 1.9 (1.1–3.3) | 0.016 | |||
Prescription of medication | Chronicity* | 0.022 | 18.4 | 0.001 | |
Subacute | 1.5 (0.6–3.4) | 0.370 | |||
Chronic | 0.3 (0.1–0.8) | 0.013 | |||
SLR | 0.003 | ||||
> 60° | 0.5 (0.3–1.0) | 0.059 | |||
< 60° | 2.2 (0.9–5.1) | 0.073 | |||
Referral to rehabilitation or physical therapy | Intensity of low back pain | 1.1 (1.0–1.2) | 0.015 | 29.5 | 0.000 |
>3 episodes of low back pain | 1.5 (1.0–2.3) | 0.039 | |||
Chronicity* | 0.006 | ||||
Subacute | 2.1 (1.3–3.4) | 0.002 | |||
Chronic | 1.9 (0.8–4.7) | 0.172 | |||
SLR | 0.018 | ||||
> 60° | 0.6 (0.4–1.1) | 0.092 | |||
< 60° | 1.4 (0.9–2.2) | 0.184 | |||
Referral to surgery (orthopedic surgery or neurosurgery) | Sex (male) | 2.0 (1.1–3.5) | 0.023 | 61.6 | 0.000 |
Intensity of leg pain | 1.2 (1.1–1.3) | 0.002 | |||
Disability | 1.1 (1.0–1.2) | 0.001 | |||
Chronicity* | 0.000 | ||||
Subacute | 3.5 (1.8–6.7) | 0.000 | |||
Chronic | 9.9 (4.0–24.4) | 0.000 | |||
Sick leave* | Roland-Morris | 1.2 (1.1–1.2) | 0.000 | 58.7 | 0.000 |
Intensity of leg pain | 1.1 (1.0–1.2) | 0.024 | |||
Employed by others | 2.0 (1.1–3.9) | 0.031 |