title: Outcomes are not different for patient-matched versus nonmatched treatment in subjects with chronic recurrent low back pain: a randomized clinical trial.
abstract: BACKGROUND
  Classification schemas for low back pain (LBP), such as the Treatment-Based Classification and the Movement System Impairment, use common clinical features to subgroup patients with LBP and are purported to improve treatment outcomes.
  
  
  OBJECTIVE
  To assess if providing matched treatments based on patient-specific clinical features led to superior treatment outcomes compared with an unmatched treatment for subjects with chronic recurrent LBP.
  
  
  METHODS
  This study is a randomized controlled trial.
  
  
  METHODS
  Subjects (n=124) with LBP (≥12 months) with or without recurrences underwent a standardized clinical examination to group them into one of two strata: ineligible or eligible for stabilization exercises based on the Treatment-Based Classification schema. Subjects underwent additional clinical tests to assign them to one of the five possible Movement System Impairment categories.
  
  
  METHODS
  Questionnaires were collected electronically at Week 0 (before treatment), Week 7 (after the 6-week 1-hour treatment sessions), and 12 months. Using the Oswestry disability index (0-100) and the Numeric Pain Rating Scale (0-10), the primary analysis was performed using the intention-to-treat principle. Secondary outcomes included fear-avoidance beliefs and psychosocial work-related and general health status.
  
  
  METHODS
  After subjects were categorized based on their particular clinical features using both the Treatment-Based Classification and Movement System Impairment schemas, they were randomized into one of two treatments using a 3:1 ratio for matched or unmatched treatments. The treatments were trunk stabilization exercise or Movement System Impairment-directed exercises.
  
  
  RESULTS
  Of the patients allocated to treatment for this study, 76 received a matched treatment and 25 received an unmatched treatment. After treatment, both groups showed a statistically significant improvement in the primary outcome measures and almost all the secondary measures; however, the matched treatment group did not demonstrate superior outcomes at Week 7 or 12 months, except on one of the secondary measures (Graded Chronic Pain Scale [Disability Scale]) (p=.01).
  
  
  CONCLUSIONS
  Providing a matched treatment based on either the Treatment-Based Classification or the Movement System Impairment classification schema did not improve treatment outcomes compared with an unmatched treatment for patients with chronic LBP, except on one secondary disability measure.
authors.affiliation: Department of Rehabilitation and Movement Science, College of Nursing and Health Science, University of Vermont, 305 Rowell Bldg, 106 Carrigan Drive, Burlington, VT 05405-0068, USA. Electronic address: sharon.henry@uvm.edu.
authors.forename: Sharon M
authors.initials: SM
authors.lastname: Henry
authors.affiliation: Program in Physical Therapy and Department of Orthopaedic Surgery, Washington University School of Medicine, Campus Box 8502, 4444 Forest Park Avenue, St. Louis, MO 63108, USA.
authors.forename: Linda R
authors.initials: LR
authors.lastname: Van Dillen
authors.affiliation: Department of Rehabilitation and Movement Science, College of Nursing and Health Science, University of Vermont, 305 Rowell Bldg, 106 Carrigan Drive, Burlington, VT 05405-0068, USA.
authors.forename: Rebecca H
authors.initials: RH
authors.lastname: Ouellette-Morton
authors.affiliation: Department of Rehabilitation and Movement Science, College of Nursing and Health Science, University of Vermont, 305 Rowell Bldg, 106 Carrigan Drive, Burlington, VT 05405-0068, USA.
authors.forename: Juvena R
authors.initials: JR
authors.lastname: Hitt
authors.affiliation: Department of Rehabilitation and Movement Science, College of Nursing and Health Science, University of Vermont, 305 Rowell Bldg, 106 Carrigan Drive, Burlington, VT 05405-0068, USA.
authors.forename: Karen V
authors.initials: KV
authors.lastname: Lomond
authors.affiliation: Department of Biostatistics, College of Medicine, University of Vermont, 305 Rowell Bldg, 106 Carrigan Drive, Burlington, VT 05405-0068, USA.
authors.forename: Michael J
authors.initials: MJ
authors.lastname: DeSarno
authors.affiliation: Department of Biostatistics, College of Medicine, University of Vermont, 305 Rowell Bldg, 106 Carrigan Drive, Burlington, VT 05405-0068, USA.
authors.forename: Janice Y
authors.initials: JY
authors.lastname: Bunn
mesh_terms: D000328:Adult; D059350:Chronic Pain / Q000145:classification / Q000628:therapy*; D003469:Culture; D005081:Exercise Therapy / Q000379:methods* / Q000523:psychology; D005239:Fear / Q000523:psychology; D005260:Female; D006801:Humans; D017116:Low Back Pain / Q000145:classification / Q000628:therapy*; D008297:Male; D008875:Middle Aged; D017063:Outcome Assessment, Health Care; D010147:Pain Measurement; D010808:Physical Examination; D026741:Physical Therapy Modalities; D012008:Recurrence; D011795:Surveys and Questionnaires; D016896:Treatment Outcome
keywords: Chronic low back pain; Classification; Exercise; Physical therapy; Randomized controlled trial; Subgroups