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Simulated computerized adaptive test for patients with shoulder impairments was efficient and produced valid measures of function.

Abstract：

BACKGROUND AND OBJECTIVE:To test unidimensionality and local independence of a set of shoulder functional status (SFS) items, develop a computerized adaptive test (CAT) of the items using a rating scale item response theory model (RSM), and compare discriminant validity of measures generated using all items (theta(IRT)) and measures generated using the simulated CAT (theta(CAT)). STUDY DESIGN AND SETTING:We performed a secondary analysis of data collected prospectively during rehabilitation of 400 patients with shoulder impairments who completed 60 SFS items. RESULTS:Factor analytic techniques supported that the 42 SFS items formed a unidimensional scale and were locally independent. Except for five items, which were deleted, the RSM fit the data well. The remaining 37 SFS items were used to generate the CAT. On average, 6 items were needed to estimate precise measures of function using the SFS CAT, compared with all 37 SFS items. The theta(IRT) and theta(CAT) measures were highly correlated (r = .96) and resulted in similar classifications of patients. CONCLUSION:The simulated SFS CAT was efficient and produced precise, clinically relevant measures of functional status with good discriminating ability.

journal_name

J Clin Epidemiol

journal_title

Journal of clinical epidemiology

authors

Hart DL,Cook KF,Mioduski JE,Teal CR,Crane PK

doi

10.1016/j.jclinepi.2005.08.006

subject

Has Abstract

pub_date

2006-03-01 00:00:00

pages

290-8

issue

3

eissn

0895-4356

issn

1878-5921

pii

S0895-4356(05)00298-2

journal_volume

59

pub_type

杂志文章

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