title: Effectiveness of a back pain prevention program: a cluster randomized controlled trial in an occupational setting.
abstract: METHODS
  A cluster randomized controlled trial and economic evaluation with a 12-month follow-up and with work department as the unit of randomization.
  
  
  OBJECTIVE
  To evaluate the effectiveness of a prevention program for low back pain (LBP) in an occupational setting with an economic evaluation.
  
  
  BACKGROUND
  LBP accounts for high economic costs in Western societies. Little is known on the effectiveness and related costs and savings of prevention programs for LBP.
  
  
  METHODS
  The study population consisted of workers in physically demanding jobs from 9 large companies located throughout The Netherlands. In each company, 2 comparable work units were randomly allocated, resulting in 18 clusters with 258 workers assigned to the intervention group and 231 workers to the control group.
  
  
  RESULTS
  Results in our study did not show significant differences in effects or costs savings of the program. Indirect costs related to work absence and productivity losses accounted for the majority (84%) of total costs due to LBP.
  
  
  CONCLUSIONS
  This study provides no evidence for the adoption of this worksite prevention program for LBP.
authors.affiliation: Department of Public Health, Erasmus MC, University Medical Center Rotterdam, Rotterdam, The Netherlands.
authors.forename: Helma
authors.initials: H
authors.lastname: IJzelenberg
authors.forename: Willem-Jan
authors.initials: WJ
authors.lastname: Meerding
authors.forename: Alex
authors.initials: A
authors.lastname: Burdorf
mesh_terms: D000328:Adult; D016000:Cluster Analysis; D017046:Cost Savings / Q000706:statistics & numerical data; D006804:Ergonomics; D005260:Female; D006306:Health Surveys; D006801:Humans; D017116:Low Back Pain / Q000191:economics / Q000517:prevention & control*; D008297:Male; D008875:Middle Aged; D009426:Netherlands; D009784:Occupational Diseases / Q000191:economics / Q000517:prevention & control*; D017063:Outcome Assessment, Health Care; D010353:Patient Education as Topic; D011315:Preventive Medicine / Q000191:economics / Q000379:methods*; D011379:Prognosis; D011584:Psychology; D017132:Workplace