• R Buchbinder, D Jolley, and M Wyatt.
• Department of Clinical Epidemiology, Cabrini Hospital, Cabrini Medical Centre, Malvern, Victoria, Australia 3144. rachelle.buchbinder@med.monash.edu.au
• BMJ. 2001 Jun 23;322(7301):1516-20.

ObjectiveTo evaluate the effectiveness of a population based, state-wide public health intervention designed to alter beliefs about back pain, influence medical management, and reduce disability and costs of compensation.DesignQuasi-experimental, non-randomised, non-equivalent, before and after telephone surveys of the general population and postal surveys of general practitioners with an adjacent state as control group and descriptive analysis of claims database.SettingTwo states in Australia.Participants4730 members of general population before and two and two and a half years after campaign started, in a ratio of 2:1:1; 2556 general practitioners before and two years after campaign onset.Main Outcome MeasuresBack beliefs questionnaire, knowledge and attitude statements about back pain, incidence of workers' financial compensation claims for back problems, rate of days compensated, and medical payments for claims related to back pain and other claims.ResultsIn the intervention state beliefs about back pain became more positive between successive surveys (mean improvement in questionnaire score 1.9 (95% confidence interval 1.3 to 2.5), P<0.001 and 3.2 (2.6 to 3.9), P<0.001, between baseline and the second and third survey, respectively). Beliefs about back pain also improved among doctors. There was a clear decline in number of claims for back pain, rates of days compensated, and medical payments for claims for back pain over the duration of the campaign.ConclusionsA population based strategy of provision of positive messages about back pain improves population and general practitioner beliefs about back pain and seems to influence medical management and reduce disability and workers' compensation costs related to back pain.

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