Content validation of two SF-36 subscales for use in type 2 diabetes and non-dialysis chronic kidney disease-related anemia
Authors
Martin, Mona L.Patrick, Donald L.
Gandra, Shravanthi R.
Bennett, Antonia V.
Leidy, Nancy K.
Nissenson, Allen R.
Finkelstein, Frederic O.
Lewis, Eldrin F.
Wu, Albert W.
Ware, John E. Jr.
UMass Chan Affiliations
Department of Quantitative Health SciencesDocument Type
Journal ArticlePublication Date
2010-12-17Keywords
Health SurveysHealth Status
Questionnaires
Activities of Daily Living
Quality of Life
Sickness Impact Profile
Diabetes Mellitus, Type 2
Biostatistics
Epidemiology
Health Services Research
Metadata
Show full item recordAbstract
PURPOSE: This study aimed to evaluate the relevance and importance of two SF-36 subscales, Vitality (VT) and Physical Function (PF), to assess concepts of energy and physical function in patients with type 2 diabetes mellitus (DM) and non-dialysis CKD-related anemia. METHODS: Patients with clinical history of DM and non-dialysis CKD-related anemia (n = 68) were identified as follows: 40 participated in concept elicitation (CE) interviews; 20 in cognitive interviews (CI), and 8 in pilot interviews. Relevance and importance ratings for SF-36 VT and PF items were obtained. Interviews were recorded, transcribed, and patient expressions of concepts coded. Inter-rater agreement was used to evaluate coding consistency. Concepts elicited were mapped to SF-36 VT and PF items. RESULTS: Patients (n = 64) were 65.6% women, 42.2% Caucasian, with mean age of 66.1 +/- 11.6 years. Of 830 coded concepts, 388 (47%) were "Energy" expressions and 287 (35%) were "PF limitations" expressions. Low energy was reported by 85% patients and rated as an important limitation by 88%. Limitations in PF were reported by 56-82% patients and rated important by 44-96%. CE and CI quotes correspond well to SF-36 VT and PF items. CONCLUSION: SF-36 VT and PF contents were suitable for assessing energy and physical function limitations, respectively, in this patient population.Source
Qual Life Res. 2010 Dec 16. Link to article on publisher's siteDOI
10.1007/s11136-010-9812-4Permanent Link to this Item
http://hdl.handle.net/20.500.14038/47844PubMed ID
21161411Related Resources
Link to Article in PubMedae974a485f413a2113503eed53cd6c53
10.1007/s11136-010-9812-4