Developing a New Version of the SF-6D Health State Classification System From the SF-36v2: SF-6Dv2
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Developing a New Version of the SF-6D Health State Classification System From the SF-36v2 : SF-6Dv2. / Brazier, John E.; Mulhern, Brendan J.; Bjorner, Jakob B.; Gandek, Barbara; Rowen, Donna; Alonso, Jordi; Vilagut, Gemma; Ware, John E.; SF-6Dv2 International Project Group.
I: Medical Care, Bind 58, Nr. 6, 2020, s. 557-565.Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › fagfællebedømt
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TY - JOUR
T1 - Developing a New Version of the SF-6D Health State Classification System From the SF-36v2
T2 - SF-6Dv2
AU - Brazier, John E.
AU - Mulhern, Brendan J.
AU - Bjorner, Jakob B.
AU - Gandek, Barbara
AU - Rowen, Donna
AU - Alonso, Jordi
AU - Vilagut, Gemma
AU - Ware, John E.
AU - SF-6Dv2 International Project Group
PY - 2020
Y1 - 2020
N2 - OBJECTIVE: The objective of this study was to develop the classification system for version of the SF-6D (SF-6Dv2) from the SF-36v2. SF-6Dv2 is an improved version of SF-6D, one of the most widely used generic measures of health for the calculation of quality-adjusted life years. STUDY DESIGN AND SETTING: A 3-step process was undertaken to generate a new classification system: (1) factor analysis to establish dimensionality; (2) Rasch analysis to understand item performance; and (3) tests of differential item function. To evaluate robustness, Rasch analyses were performed in multiple subsets of 2 large cross-sectional datasets from recently discharged hospital patients and online patient samples. RESULTS: On the basis of factor analysis, other psychometric evidence, cross-cultural considerations, and amenability to valuation, the 6-dimension classification used in SF-6D was maintained. SF-6Dv2 resulted in the following modifications to SF-6D: a simpler classification of physical function with clearer separation between levels; a more detailed 5-level description of role limitations; using negative wording to describe vitality; and using pain severity rather than pain interference. CONCLUSIONS: The SF-6Dv2 classification system describes more distinct levels of health than SF-6D, changes the descriptions used for a number of dimensions and provides clearer wording for health state valuation. The second stage of the study has developed a utility value set using discrete choice methods so that the measure can be used in health technology assessment. Further work should investigate the psychometric characteristics of the new instrument.
AB - OBJECTIVE: The objective of this study was to develop the classification system for version of the SF-6D (SF-6Dv2) from the SF-36v2. SF-6Dv2 is an improved version of SF-6D, one of the most widely used generic measures of health for the calculation of quality-adjusted life years. STUDY DESIGN AND SETTING: A 3-step process was undertaken to generate a new classification system: (1) factor analysis to establish dimensionality; (2) Rasch analysis to understand item performance; and (3) tests of differential item function. To evaluate robustness, Rasch analyses were performed in multiple subsets of 2 large cross-sectional datasets from recently discharged hospital patients and online patient samples. RESULTS: On the basis of factor analysis, other psychometric evidence, cross-cultural considerations, and amenability to valuation, the 6-dimension classification used in SF-6D was maintained. SF-6Dv2 resulted in the following modifications to SF-6D: a simpler classification of physical function with clearer separation between levels; a more detailed 5-level description of role limitations; using negative wording to describe vitality; and using pain severity rather than pain interference. CONCLUSIONS: The SF-6Dv2 classification system describes more distinct levels of health than SF-6D, changes the descriptions used for a number of dimensions and provides clearer wording for health state valuation. The second stage of the study has developed a utility value set using discrete choice methods so that the measure can be used in health technology assessment. Further work should investigate the psychometric characteristics of the new instrument.
U2 - 10.1097/MLR.0000000000001325
DO - 10.1097/MLR.0000000000001325
M3 - Journal article
C2 - 32412942
AN - SCOPUS:85084787960
VL - 58
SP - 557
EP - 565
JO - Medical Care
JF - Medical Care
SN - 0025-7079
IS - 6
ER -
ID: 242846963