title: The Brazilian-Portuguese versions of the McGill Pain Questionnaire were reproducible, valid, and responsive in patients with musculoskeletal pain.
abstract: OBJECTIVE
  To cross-culturally adapt the Short Form of the McGill Pain Questionnaire (SF-MPQ) into Brazilian-Portuguese and test the clinimetric properties of the newly developed SF-MPQ and the previously cross-culturally adapted Brazilian-Portuguese Long Form of the McGill Pain Questionnaire (LF-MPQ).
  
  
  METHODS
  The SF-MPQ was translated and adapted into Brazilian-Portuguese following recommendations from current guidelines. Both SF-MPQ and LF-MPQ were administered in a prospective longitudinal design to 203 patients with a range of musculoskeletal conditions to evaluate their clinimetric properties.
  
  
  RESULTS
  Both questionnaires demonstrated high levels of internal consistency (Cronbach α range=0.70-0.79), reliability (intraclass correlation coefficient(2,1) range=0.69-0.85), and agreement (standard error of the measurement range=0.80-6.92). We observed positive and moderate-to-high correlations among the SF-MPQ, the LF-MPQ, and the Numerical Rating Scale (Pearson r ranging from 0.49 to 0.68). No ceiling or floor effects were detected. Both versions demonstrated acceptable levels of responsiveness (effect size range=0.30-0.60; correlations range=0.23-0.51; and area under the curve range=0.56-0.76).
  
  
  CONCLUSIONS
  The Brazilian-Portuguese versions of the MPQ were found to be reproducible, valid, and responsive for the assessment of pain in patients with musculoskeletal conditions.
authors: The George Institute for Global Health, The University of Sydney, Missenden Road, Sydney, NSW 2050, Australia. lmenezes@georgeinstitute.org.au
authors: Lucíola da C
authors: Lda C
authors: Menezes Costa
authors: Christopher G
authors: CG
authors: Maher
authors: James H
authors: JH
authors: McAuley
authors: Mark J
authors: MJ
authors: Hancock
authors: Warley
authors: W
authors: de Melo Oliveira
authors: Daniel Camara
authors: DC
authors: Azevedo
authors: Ludmilla Motta Andrade
authors: LM
authors: Freitas Pozzi
authors: André Roberto Scarpelli
authors: AR
authors: Pereira
authors: Leonardo Oliveira Pena
authors: LO
authors: Costa
mesh_terms: D000328:Adult; D003431:Cross-Cultural Comparison; D005260:Female; D006801:Humans; D007802:Language; D008297:Male; D009140:Musculoskeletal Diseases / Q000150:complications / Q000523:psychology*; D010146:Pain / Q000453:epidemiology / Q000523:psychology*; D010147:Pain Measurement / Q000379:methods / Q000592:standards*; D015203:Reproducibility of Results; D014175:Translating