title: A single question was as predictive of outcome as the Tampa Scale for Kinesiophobia in people with sciatica: an observational study.
abstract: OBJECTIVE
  In people with sciatica in primary care, can a single question be used to predict outcome at 1 year followup as accurately as validated questionnaires on kinesiophobia, disability, and health-related quality of life?
  
  
  METHODS
  Observational study within a randomised cohort.
  
  
  METHODS
  135 people with sciatica in primary care.
  
  
  METHODS
  Kinesiophobia was measured with the Tampa Scale for Kinesiophobia (TSK), disability with the Roland Morris Disability Questionnaire (RDQ), and health-related quality of life with the EQ-5D and the 36-item Short Form (SF-36) Physical Component Summary. Participants also answered a newly devised substitute question for each questionnaire on an 11-point numerical rating scale. Global perceived effect and severity of leg pain were recorded at 1 year follow-up.
  
  
  RESULTS
  The correlation coefficient between the TSK and its substitute question was r=0.46 (p<0.001). The substitute question was better at predicting pain severity in the leg at 1 year follow-up than the TSK (addition of explained variation of 11% versus 4% in a logistic regression analysis). The TSK and its substitute question did not significantly differ in their prediction of global perceived effect at 1 year follow-up. The other substitute questions and both the RDQ and EQ-5D did not contribute significantly to one or both of their prediction models.
  
  
  CONCLUSIONS
  It may be feasible to replace the TSK by a single substitute question for predicting outcome in people with sciatica in primary care. The other substitute questions did not consistently predict outcome at 1 year follow-up.
authors.affiliation: Department of General Practice, University Medical Center, Rotterdam, The Netherlands. j.verwoerd@erasmusmc.nl
authors.forename: Annemieke J H
authors.initials: AJ
authors.lastname: Verwoerd
authors.forename: Pim A J
authors.initials: PA
authors.lastname: Luijsterburg
authors.forename: Reinier
authors.initials: R
authors.lastname: Timman
authors.forename: Bart W
authors.initials: BW
authors.lastname: Koes
authors.forename: Arianne P
authors.initials: AP
authors.lastname: Verhagen
mesh_terms: D000328:Adult; D004185:Disability Evaluation; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009043:Motor Activity; D010698:Phobic Disorders / Q000523:psychology / Q000534:rehabilitation*; D011237:Predictive Value of Tests; D011788:Quality of Life; D012585:Sciatica / Q000503:physiopathology / Q000523:psychology / Q000534:rehabilitation*; D011795:Surveys and Questionnaires