• van Erp Reni M A RM Department of Rehabilitation Medicine, CAPHRI, Maastricht University., Ivan P J Huijnen, Jeanine A Verbunt, and Rob J E M Smeets.
• Department of Rehabilitation Medicine, CAPHRI, Maastricht University.
• J Physiother. 2015 Jul 1; 61 (3): 155.

IntroductionMultidisciplinary biopsychosocial interventions are effective at improving functional disability in people with chronic low back pain. However, these interventions are often expensive and have long waiting times before treatment starts. Therefore, implementing biopsychosocial interventions in primary care settings may be of interest. Because people with chronic low back pain show different biopsychosocial profiles, they might respond differently to specific interventions.Research QuestionsThis study will investigate the difference in (cost) effectiveness between a biopsychosocial primary care intervention, Back on Track, and primary care physiotherapy as usual in a subgroup of adults with chronic low back pain.DesignDouble-blind, multicentre (n = 8), randomised, controlled trial.ParticipantsEighty-six adults with chronic low back pain, aged 18 to 65 years, experiencing low to moderate levels of disability and in whom the contributing role of psychosocial factors to this disability is restricted.InterventionThe Back on Track intervention: four individual and eight group sessions, based on biopsychosocial approaches from multidisciplinary pain rehabilitation programs and provided by trained physiotherapists.ControlPrimary care physiotherapy as usual.MeasurementsThe primary outcome is functional disability (Quebec Back Pain Disability Scale) at post treatment, and 3-month and 12-month follow-up. Secondary measures are: credibility and expectancy, anxiety and depression, catastrophising, pain intensity, kinesiophobia, self-efficacy, participant's global perceived effect, cost-effectiveness, and cost-utility estimated with cost diaries and quality-adjusted life years.AnalysisLinear mixed models using an intention-to-treat principle. Incremental cost-effectiveness and cost-utility ratios will be calculated and plotted on a cost-effectiveness plane.DiscussionThis study will provide useful information on a biopsychosocial intervention for chronic low back pain in primary care settings.Copyright © 2015 Australian Physiotherapy Association. Published by Elsevier B.V. All rights reserved.

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