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Elaboration and validation of a questionnaire assessing patient expectations about management of knee osteoarthritis by their physicians: the Knee Osteoarthritis Expectations Questionnaire.

Abstract：

OBJECTIVES:To develop a questionnaire assessing the expectations of patients regarding management of osteoarthritis (OA of the knee. METHODS:A detailed document reporting on a qualitative analysis of interviews of patients with knee OA was sent to experts and a Delphi procedure was adopted for item generation. Eighty physicians (64 general practitioners, 16 rheumatologists) recruited 566 patients with knee OA to test the provisional questionnaire. Items were reduced according to their metric properties and exploratory factor analysis. The reliability of the questionnaire was tested by the Cronbach α coefficient. Construct validity was tested by divergent validity and confirmatory factor analysis. Test-retest reliability was assessed by the intraclass correlation coefficient (ICC) and the Bland-Altman technique. RESULTS:Sixty items were extracted from analysis of the interview data. The experts needed three Delphi rounds to obtain consensus on a 33-item provisional questionnaire. The item reduction process resulted in an 18-item questionnaire. Exploratory factor analysis extracted three main factors: factor 1 represented expectations for education, factor 2 expectations for information on technical and human support, and factor 3 expectations for physician empathy. The Cronbach α coefficient was 0.91 (95% CI 0.89 to 0.92). Expected divergent validity was observed. Confirmation factor analyses confirmed higher intra-factor than inter-factor correlations. Test-retest reliability was good with an ICC of 0.79, and Bland-Altman analysis did not reveal a systematic trend. CONCLUSIONS:A new 18-item questionnaire assessing patient expectations of management of knee OA by their physicians is proposed. The questionnaire has good content and construct validity.

journal_name

Ann Rheum Dis

journal_title

Annals of the rheumatic diseases

authors

Benhamou M,Boutron I,Dalichampt M,Baron G,Alami S,Rannou F,Ravaud P,Poiraudeau S

doi

10.1136/annrheumdis-2011-201206

subject

Has Abstract

pub_date

2013-04-01 00:00:00

pages

552-9

issue

eissn

0003-4967

issn

1468-2060

pii

annrheumdis-2011-201206

journal_volume

pub_type

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Elaboration and validation of a questionnaire assessing patient expectations about management of knee osteoarthritis by their physicians: the Knee Osteoarthritis Expectations Questionnaire.