Adjusted odds ratios of the baseline factors for persistent low back pain (LBP) with work disability; factors with crude odds ratio P values<0.1.

OR: odds ratio, CI: confidence interval, LBP: low back painaAdjusted for age, gender, obesity, smoking habits, and education.bAdjusted for age, gender, obesity, smoking habits, education, and manual handling of materials at work.cBending, twisting, lifting, and pushing: ≥ half of the day was considered frequent.dHours of desk work: longer than 6 hours per day was considered to be static posture.eWork-related stress factors assessed with the brief job stress questionnaire: not feeling stressed, feeling stressed: the 5 original responses were reclassified into “not feeling stressed”, where low, slightly low and moderate were combined, and “feeling stressed”, where slightly high and high were combined.