title: Instruments to assess patients with rotator cuff pathology: a systematic review of measurement properties.
abstract: OBJECTIVE
  The aims of this study were to obtain an overview of the methodological quality of studies on the measurement properties of rotator cuff questionnaires and to describe how well various aspects of the design and statistical analyses of studies on measurement properties are performed.
  
  
  METHODS
  A systematic review of published studies on the measurement properties of rotator cuff questionnaires was performed. Two investigators independently rated the quality of the studies using the Consensus-based Standards for the selection of health Measurement Instruments checklist. This checklist was developed in an international Delphi consensus study.
  
  
  RESULTS
  Sixteen studies were included, in which two measurement instruments were evaluated, namely the Western Ontario Rotator Cuff Index and the Rotator Cuff Quality-of-Life Measure. The methodological quality of the included studies was adequate on some properties (construct validity, reliability, responsiveness, internal consistency, and translation) but need to be improved on other aspects. The most important methodological aspects that need to be developed are as follows: measurement error, content validity, structural validity, cross-cultural validity, criterion validity, and interpretability.
  
  
  CONCLUSIONS
  Considering the importance of adequate measurement properties, it is concluded that, in the field of rotator cuff pathology, there is room for improvement in the methodological quality of studies measurement properties.
  
  
  METHODS
  II.
authors.affiliation: Department of Orthopaedic and Trauma Surgery, Campus Bio-Medico University, Via Alvaro del Portillo, 200, 00128, Trigoria, Rome, Italy. g.longo@unicampus.it
authors.forename: Umile Giuseppe
authors.initials: UG
authors.lastname: Longo
authors.forename: Daniël
authors.initials: D
authors.lastname: Saris
authors.forename: Rudolf W
authors.initials: RW
authors.lastname: Poolman
authors.forename: Alessandra
authors.initials: A
authors.lastname: Berton
authors.forename: Vincenzo
authors.initials: V
authors.lastname: Denaro
mesh_terms: D003469:Culture; D005069:Evaluation Studies as Topic; D006801:Humans; D017063:Outcome Assessment, Health Care; D011788:Quality of Life; D015203:Reproducibility of Results; D000070636:Rotator Cuff Injuries; D012720:Severity of Illness Index; D011795:Surveys and Questionnaires; D013708:Tendon Injuries / Q000175:diagnosis*