TY - JOUR
T1 - Content validation of two SF-36 subscales for use in type 2 diabetes and non-dialysis chronic kidney disease-related anemia
AU - Martin, Mona L.
AU - Patrick, Donald L.
AU - Gandra, Shravanthi R.
AU - Bennett, Antonia V.
AU - Leidy, Nancy K.
AU - Nissenson, Allen R.
AU - Finkelstein, Fredric O.
AU - Lewis, Eldrin F.
AU - Wu, Albert W.
AU - Ware, John E.
PY - 2011/8
Y1 - 2011/8
N2 - 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.
AB - 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.
KW - Activities of daily living (MeSH)
KW - Anemia (MeSH)
KW - Diabetes mellitus
KW - Questionnaires (MeSH)
KW - Renal insufficiency (MeSH)
KW - Type 2 (MeSH)
KW - Validation studies (MeSH)
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U2 - 10.1007/s11136-010-9812-4
DO - 10.1007/s11136-010-9812-4
M3 - Article
C2 - 21161411
AN - SCOPUS:80052322525
SN - 0962-9343
VL - 20
SP - 889
EP - 901
JO - Quality of Life Research
JF - Quality of Life Research
IS - 6
ER -