A Guideline-Implementation Intervention to Improve the Management of Low Back Pain in Primary Care: A Difference-in-Difference-in-Differences Analysis

Ross Wilson (), Yana Pryymachenko, J. Haxby Abbott, Sarah Dean, James Stanley, Sue Garrett, Fiona Mathieson, Anthony Dowell and Ben Darlow
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Ross Wilson: University of Otago
Yana Pryymachenko: University of Otago
J. Haxby Abbott: University of Otago
Sarah Dean: University of Exeter
James Stanley: University of Otago
Sue Garrett: University of Otago
Fiona Mathieson: University of Otago
Anthony Dowell: University of Otago
Ben Darlow: University of Otago

Applied Health Economics and Health Policy, 2023, vol. 21, issue 2, No 7, 253-262

Abstract: Abstract Background Real-world adherence to clinical practice guidelines is often poor, resulting in sub-standard patient care and unnecessary healthcare costs. This study evaluates the effect of a guideline-implementation intervention for the management of low back pain (LBP) in general practice–the Fear Reduction Exercised Early (FREE) approach—on LBP-related injury insurance claims, healthcare utilisation, and costs of treatment. Design Data were extracted from comprehensive nationwide New Zealand injury insurance claims records. Data were analysed using a ‘triple-difference’ (difference-in-difference-in-differences) method to isolate the causal effect of FREE training on LBP claims activity, comparing the difference in general practitioner (GP) LBP claims and associated activity before and after training with their non-musculoskeletal injury claims for the same periods (assumed to be unaffected by training), relative to the same comparisons for GPs not trained in the FREE approach. Results Training GPs in the FREE approach resulted in significant reductions in the number of LBP injury claims lodged (− 19%, 95% CI −34 to −5), the use of physiotherapy (−30%, 95% CI − 42 to − 18) and imaging (− 27%, 95% CI − 46 to − 8%), and the healthcare costs (− 21%, 95% CI − 41 to − 1) of LBP injury. Changes in claims for earnings’ compensation (− 10%, 95% CI − 34 to 13) were not significant. Conclusions A brief guideline-implementation intervention following best-practice LBP management and guideline-implementation strategies achieved significant reductions, persisting over at least 6 to18 months, in healthcare utilisation consistent with improved delivery of guideline-concordant care.

Date: 2023
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DOI: 10.1007/s40258-022-00776-3

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