Peter Oesch, Jan Kool, Kåre Birger Hagen, Stefan Bachmann
DOI: 10.2340/16501977-0524

Objectives: To determine whether exercise is more effective than usual care to reduce work disability in patients with non-acute non-specific low back pain, and if so, to explore which type of exercise is most effective.
Methods: Systematic review and meta-analysis of randomized controlled trials investigating the effectiveness of exercise in non-acute non-specific low back pain, and reporting on work disability. Data sources: MEDLINE, EMBASE, PEDro, Cochrane Library databases, NIOSHTIC-2, and PsycINFO until August 2008. Work disability data were converted to odds ratios. Random effects meta-analyses were conducted.
Results: A total of 23 trials met the inclusion criteria, 20 of which were suitable for inclusion in meta-analysis allowing 17 comparisons of exercise interventions with usual care and 11 comparisons of 2 different exercise interventions. A statistically significant effect in favour of exercise on work disability was found in the long term (odds ratio (OR) = 0. 66, 95% confidence interval (CI) 0. 48–0. 92) but not in the short (OR = 0. 80, 95% CI 0. 51–1. 25) and intermediate term (OR = 0. 78, 95% CI 0. 45–1. 34). Meta-regression indicated no significant effect of specific exercise characteristics.
Conclusion: Exercise interventions have a significant effect on work disability in patients with non-acute non-specific low back pain in the long term. No conclusions can be made regarding exercise types.