http://stroke.ahajournals.org/content/48/3/618?etoc=
This article requires a subscription to view the full text. If
you have a subscription you may use the login form below to view the
article. Access to this article can also be purchased.
Abstract
Background and Purpose—There
may be a potential to reduce the number of items assessed in the
Barthel Index (BI), and shortened versions of the BI have been
described. We sought to collate all existing short-form BI (SF-BI) and
perform a comparative validation using clinical trial data.
Methods—We
performed a systematic review across multidisciplinary electronic
databases to find all published SF-BI. Our validation used the VISTA
(Virtual International Stroke Trials Archive) resource. We describe
concurrent validity (agreement of each SF-BI with BI), convergent and
divergent validity (agreement of each SF-BI with other outcome measures
available in the data set), predictive validity (association of
prognostic factors with SF-BI outcomes), and content validity (item
correlation and exploratory factor analyses).
Results—From
3546 titles, we found 8 articles describing 6 differing SF-BI. Using
acute trial data (n=8852), internal reliability suggested redundancy in
BI (Cronbach α, 0.96). Each SF-BI demonstrated a strong correlation with
BI, modified Rankin Scale, National Institutes of Health Stroke Scale
(all ρ≥0.83; P<0.001). Using rehabilitation trial data
(n=332), SF-BI demonstrated modest correlation with quality of life
measures Stroke Impact Scale and 5 domain EuroQOL (ρ≥0.50, P<0.001). Prespecified prognostic factors were associated with SF-BI outcomes (all P<0.001).
Our factor analysis described a 3 factor structure, and item reduction
suggested an optimal 3-item SF-BI comprising bladder control, transfer,
and mobility items in keeping with 1 of the 3-item SF-BI previously
described in the literature.
Conclusions—There
is redundancy in the original BI; we have demonstrated internal and
external validity of a 3-item SF-BI that should be simple to use.
No comments:
Post a Comment