Francis Guillemin1, Anne-Christine Rat2, Christophe Goetz3, Elisabeth Spitz3, Jacques Pouchot4, Joël Coste5. 1. University of Lorraine, University Paris Descartes, EA 4360 Apemac, avenue de la Foret de Haye, Vandoeuvre-les-Nancy, France; Centre d'investigation clinique - Epidémiologie clinique CIC 1433 Institute national de la santé et de la recherche médicale, rue du Morvan, Vandoeuvre-les-Nancy, Nancy, France. Electronic address: francis.guillemin@univ-lorraine.fr. 2. University of Lorraine, University Paris Descartes, EA 4360 Apemac, avenue de la Foret de Haye, Vandoeuvre-les-Nancy, France; Centre d'investigation clinique - Epidémiologie clinique CIC 1433 Institute national de la santé et de la recherche médicale, rue du Morvan, Vandoeuvre-les-Nancy, Nancy, France; Department of Rheumatology, CHU de Brabois, rue du Morvan, Vandoeuvre-les-Nancy, Nancy, France. 3. University of Lorraine, University Paris Descartes, EA 4360 Apemac, avenue de la Foret de Haye, Vandoeuvre-les-Nancy, France. 4. University of Lorraine, University Paris Descartes, EA 4360 Apemac, avenue de la Foret de Haye, Vandoeuvre-les-Nancy, France; Department of Internal Medicine, Assistance publique-Hôpitaux de Paris, Hôpital européen Georges Pompidou, rue Leblanc, Paris, France. 5. University of Lorraine, University Paris Descartes, EA 4360 Apemac, avenue de la Foret de Haye, Vandoeuvre-les-Nancy, France; Biostatistics and Epidemiology Unit, Assistance publique-Hôpitaux de Paris, Hôtel Dieu, place du Parvis Notre-Dame, Paris, France.
Abstract
OBJECTIVES: To develop a short form of the knee and hip osteoarthritis quality of life questionnaire, the Mini-OAKHQOL, preserving the conceptual model and, as far as possible, the content and the psychometric properties of the original instrument. STUDY DESIGN AND SETTING: A two-step shortening procedure was used: (1) a consensus Delphi method, with a panel of patients and another of professionals independently asked to select items and (2) a nominal group, where patients, professionals, and methodologists reached consensus on the final selection of items, using information from the panels and from modern measurement and classical test theory analyses. The psychometric properties of the Mini-OAKHQOL were assessed in an independent population-based sample of 581 subjects with knee or hip osteoarthritis. RESULTS: The two-step shortening procedure resulted in a 20-item questionnaire. Confirmatory factor analysis showed preservation of the original five-dimensional structure. Rasch analyses showed the unidimensionality and invariance by sex, age, and joint of the main dimensions. Convergent validity, reproducibility, and internal consistency were similar to or better than those of the original OAKHQOL. CONCLUSIONS: The 20-item Mini-OAKHQOL has good psychometric properties and can be used for the measurement of quality of life in subjects with osteoarthritis of the lower limbs.
OBJECTIVES: To develop a short form of the knee and hip osteoarthritis quality of life questionnaire, the Mini-OAKHQOL, preserving the conceptual model and, as far as possible, the content and the psychometric properties of the original instrument. STUDY DESIGN AND SETTING: A two-step shortening procedure was used: (1) a consensus Delphi method, with a panel of patients and another of professionals independently asked to select items and (2) a nominal group, where patients, professionals, and methodologists reached consensus on the final selection of items, using information from the panels and from modern measurement and classical test theory analyses. The psychometric properties of the Mini-OAKHQOL were assessed in an independent population-based sample of 581 subjects with knee or hip osteoarthritis. RESULTS: The two-step shortening procedure resulted in a 20-item questionnaire. Confirmatory factor analysis showed preservation of the original five-dimensional structure. Rasch analyses showed the unidimensionality and invariance by sex, age, and joint of the main dimensions. Convergent validity, reproducibility, and internal consistency were similar to or better than those of the original OAKHQOL. CONCLUSIONS: The 20-item Mini-OAKHQOL has good psychometric properties and can be used for the measurement of quality of life in subjects with osteoarthritis of the lower limbs.
Authors: Maud Wieczorek; Christine Rotonda; Jonathan Epstein; Francis Guillemin; Anne-Christine Rat Journal: Qual Life Res Date: 2018-06-12 Impact factor: 4.147