Using Optimal Test Assembly Methods for Shortening Patient‐Reported Outcome Measures: Development and Validation of the Cochin Hand Function Scale‐6: A Scleroderma Patient‐Centered Intervention Network Cohort Study. Issue 11 (9th October 2016)

• Record Type: Journal Article
• Authors: Levis, Alexander W.; Harel, Daphna; Kwakkenbos, Linda; Carrier, Marie‐Eve; Mouthon, Luc; Poiraudeau, Serge; Bartlett, Susan J.; Khanna, Dinesh; Malcarne, Vanessa L.; Sauve, Maureen; van den Ende, Cornelia H. M.; Poole, Janet L.; Schouffoer, Anne A.; Welling, Joep; Thombs, Brett D.
• Other Names: Baron Murray investigator.; Ells Carolyn investigator.; Jang Yeona investigator.; Steele Russell J. investigator.; Furst Dan investigator.; Kafaja Suzanne investigator.; Gottesman Karen investigator.; van den Hoogen Frank investigator.; Mayes Maureen D. investigator.; Assassi Shervin investigator.; Nielson Warren R. investigator.; Riggs Robert investigator.; Wigley Fredrick investigator.; Boutron Isabelle investigator.; Maia Angela Costa investigator.; Leite Catarina investigator.; El‐Baalbaki Ghassan investigator.; Persmann Jennifer investigator.; Fligelstone Kim investigator.; Fortune Catherine investigator.; Nielsen Karen investigator.; Frech Tracy investigator.; Godard Dominique investigator.; Hudson Marie investigator.; Gyger Genevieve investigator.; Delisle Vanessa C. investigator.; Jewitt Lisa R. investigator.; Levis Brooke investigator.; Milette Katherine investigator.; Impens Ann investigator.; Johnson Sindhu R. investigator.; Kennedy Ann Tyrell investigator.; Larche Maggie investigator.; Khalidi Nader investigator.; Marra Carlo investigator.; Pope Janet investigator.; Portales Alexandra investigator.; Reyna Tatiana Sofia Rodriguez investigator.; Suarez‐Almazor Maria E. investigator.; Wong‐Rieger Durhane investigator.; Albert Alexandra investigator.; Fortin Paul investigator.; Ikic Alena investigator.; Arsenault Guylaine investigator.; Bissonnette Lyne investigator.; Boire Gilles investigator.; Bruns Alessandra investigator.; Dagenais Pierre investigator.; Fernandes Artur Jose de B. investigator.; Liang Patrick investigator.; Masetto Ariel investigator.; Roux Sophie investigator.; Carreira Patricia investigator.; Chung Lorinda investigator.; Denton Christopher investigator.; Gill Anna investigator.; Domsic Robyn investigator.; Dunne James V. investigator.; Wilcox Pearce investigator.; Gordon Jessica investigator.; Spiera Robert investigator.; Herrick Ariane L. investigator.; Hinchcliff Monique investigator.; Korman Benjamin investigator.; Varga John investigator.; Jones Niall investigator.; Manning Joanne investigator.; Robinson David investigator.; Schiopu Elena investigator.; Smith Doug investigator.; Steen Virginia investigator.; Sutton Evelyn investigator.; Thorne Carter investigator.; Fedoruk Claire investigator.; Pepin Mia R. investigator.; Fox Rina S. investigator.; Gholizadeh Shadi investigator.; Mills Sarah D. investigator.;
• Is Part Of: Arthritis care & research. Volume 68:Issue 11(2016:Nov.)
• Page Start: 1704
• Page End: 1713
• Publication Date: 2016-10-09
• Subjects: Arthritis -- Periodicals; Rheumatism -- Periodicals; 616.72
• DOI: 10.1002/acr.22893
• Languages: English
• ISSNs: 2151-464X

Abstract

Abstract : Objective: To develop and validate a short form of the Cochin Hand Function Scale (CHFS), which measures hand disability, for use in systemic sclerosis, using objective criteria and reproducible techniques. Methods: Responses on the 18‐item CHFS were obtained from English‐speaking patients enrolled in the Scleroderma Patient‐Centered Intervention Network Cohort. CHFS unidimensionality was verified using confirmatory factor analysis, and an item response theory model was fit to CHFS items. Optimal test assembly (OTA) methods identified a maximally precise short form for each possible form length between 1 and 17 items. The final short form selected was the form with the least number of items that maintained statistically equivalent convergent validity, compared to the full‐length CHFS, with the Health Assessment Questionnaire (HAQ) disability index (DI) and the physical function domain of the 29‐item Patient‐Reported Outcomes Measurement Information System (PROMIS‐29). Results: There were 601 patients included. A 6‐item short form of the CHFS (CHFS‐6) was selected. The CHFS‐6 had a Cronbach's alpha of 0.93. Correlations of the CHFS‐6 summed score with HAQ DI (r = 0.79) and PROMIS‐29 physical function (r = −0.54) were statistically equivalent to the CHFS (r = 0.81 and r = −0.56). The correlation with the full CHFS was high (r = 0.98). Conclusion: The OTA procedure generated a valid short form of the CHFS with minimal loss of information compared to the full‐length form. The OTA method used was based on objective, prespecified criteria, but should be further studied for viability as a general procedure for shortening patient‐reported outcome measures in health research.