Validity, responsiveness and minimal important difference for the SF-6D health utliity scale in a spinal cord injured population

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Show simple item record Lee, BB King, MT Simpson, JM Haran, MJ Stockler, MR Marial, O Salkeld, G 2010-05-28T09:50:49Z 2008-01
dc.identifier.citation Value in Health, 2008, 11 (4), pp. 680 - 688
dc.identifier.issn 1098-3015
dc.identifier.other C1 en_US
dc.description.abstract Objective: To determine the feasibility, acceptability, discriminative validity, responsiveness, and minimal important difference (MID) of the SF-6D for people with spinal cord injury (SCI). Methods: A total of 305 people with SCI completed the SF-36 health status questionnaire at baseline and at subsequent occurrence of a urinary tract infection (UTI) or 6-month follow-up. Normative SF-36 data were obtained from the Australian Bureau of Statistics. SF-36 scores were transformed to SF-6D utility values using Brazier's algorithm. We used UTI as the external criterion of clinically important change to determine responsiveness and two categories of the SF-36 transition question (somewhat worse and somewhat better) as the external criterion to determine the MID. Derived SF-12 responsiveness was also assessed. Results: The mean SF-6D values were: 0.68 (SD 0.21, n = 305) all patients; 0.66 (SD 0.19, n = 167) tetraplegia; 0.72 (SD 0.26, n = 138) paraplegia; 0.57 (SD 0.15, n = 138) with UTI. The Australian normative SF-6D mean value was 0.80 (SD 0.14, n = 18,005). The SF-6D was able to discriminate between SCI and the Australian normative sample (effect size [ES] = 0.86), tetraplegiaparaplegia (ES = 0.23), and it was responsive to UTI (ES = 0.86 SF-36 variant, ES = 0.92 SF-12 variant). The MID for respondents who reported being somewhat worse or somewhat better at follow-up was 0.03 (SD 0.17, n = 108/305), while the MID for only those who were somewhat worse was 0.10 (SD 0.14, n = 58). Conclusions: The content of the SF-6D is more appropriate than that of the SF-36 for this physically impaired population. The SF-6D has discriminative power and is responsive to clinically important change because of UTI. The MID is consistent with published estimates for other disease groups.
dc.publisher Blackwell Publishing
dc.relation.isbasedon 10.1111/j.1524-4733.2007.00311.x
dc.title Validity, responsiveness and minimal important difference for the SF-6D health utliity scale in a spinal cord injured population
dc.type Journal Article
dc.parent Value in Health
dc.journal.volume 4
dc.journal.volume 11
dc.journal.number 4 en_US
dc.publocation United States en_US
dc.identifier.startpage 680 en_US
dc.identifier.endpage 688 en_US BUS.Centre for Health Economics Research and Evaluation en_US
dc.conference Verified OK en_US
dc.for 111702 Aged Health Care
dc.personcode 020118
dc.percentage 100 en_US Aged Health Care en_US
dc.classification.type FOR-08 en_US
dc.edition en_US
dc.custom en_US en_US
dc.location.activity en_US
dc.description.keywords SF-6D, rating scales, spinal cord injury en_US
pubs.embargo.period Not known
pubs.organisational-group /University of Technology Sydney
pubs.organisational-group /University of Technology Sydney/Faculty of Business
utslib.copyright.status Closed Access 2015-04-15 12:17:09.805752+10
utslib.collection.history Closed (ID: 3)

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