• Cathrine Elgaard Jensen, Allan Riis, Karin Dam Petersen, Martin Bach Jensen, and Kjeld Møller Pedersen.
• aDanish Center for Healthcare Improvements, Faculty of Social Sciences, Department of Business and Management, Aalborg University, Aalborg, Denmark bResearch Unit for General Practice in Aalborg, Department of Clinical Medicine, Aalborg University, Aalborg, Denmark cCentre of Health Economics Research, Faculty of Business and Social Sciences, Department of Business and Economics and Department of Public Health University of Southern Denmark, Odense, Denmark.
• Pain. 2017 May 1; 158 (5): 891-899.

AbstractIn connection with the publication of a clinical practice guideline on the management of low back pain (LBP) in general practice in Denmark, a cluster randomised controlled trial was conducted. In this trial, a multifaceted guideline implementation strategy to improve general practitioners' treatment of patients with LBP was compared with a usual implementation strategy. The aim was to determine whether the multifaceted strategy was cost effective, as compared with the usual implementation strategy. The economic evaluation was conducted as a cost-utility analysis where cost collected from a societal perspective and quality-adjusted life years were used as outcome measures. The analysis was conducted as a within-trial analysis with a 12-month time horizon consistent with the follow-up period of the clinical trial. To adjust for a priori selected covariates, generalised linear models with a gamma family were used to estimate incremental costs and quality-adjusted life years. Furthermore, both deterministic and probabilistic sensitivity analyses were conducted. Results showed that costs associated with primary health care were higher, whereas secondary health care costs were lower for the intervention group when compared with the control group. When adjusting for covariates, the intervention was less costly, and there was no significant difference in effect between the 2 groups. Sensitivity analyses showed that results were sensitive to uncertainty. In conclusion, the multifaceted implementation strategy was cost saving when compared with the usual strategy for implementing LBP clinical practice guidelines in general practice. Furthermore, there was no significant difference in effect, and the estimate was sensitive to uncertainty.

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