Predictive tests for non-return to work in patients with chronic low back pain

Area of Science:

• Rehabilitation Medicine
• Occupational Health
• Pain Management

Background:

• Return to work (RTW) is a key goal for chronic low back pain (CLBP) patients.
• Many CLBP patients do not achieve RTW despite rehabilitation.
• Predictive tests are needed to identify patients who will not RTW for cost-effective rehabilitation.

Purpose of the Study:

• To evaluate the reliability and predictive validity of four tests for non-RTW in CLBP patients.
• To assess psychosocial factors (nationality, off-work duration, unemployment, work load) as predictors of non-RTW.
• To determine the most effective combination of tests for predicting non-RTW.

Main Methods:

• Prospective cohort study of 99 CLBP patients.
• Recorded physical work load, time off work, unemployment, and nationality.
• Investigated four prognostic tests: Numeric Pain Rating Scale (NRS), Step Test, Pseudo Strength Test, and Behavioural Signs.
• Obtained RTW status after 12 months via postal survey.

Main Results:

• The RTW rate at 1 year was 20%.
• All four investigated tests significantly correlated with non-RTW.
• A combination of at least two positive tests yielded the best prediction of non-RTW (positive predictive value 0.97).
• Psychosocial factors were less predictive than the combined tests.

Conclusions:

• The combination of four prognostic tests reliably predicts non-RTW in CLBP patients.
• Using these tests can enhance the cost-effectiveness of rehabilitation programs.
• Excluding patients with two or more positive tests may optimize resource allocation for RTW interventions.