The AMC Linear Disability Score project in a population requiring residential care: psychometric propertiesReportar como inadecuado

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Health and Quality of Life Outcomes

, 2:42

First Online: 03 August 2004Received: 22 June 2004Accepted: 03 August 2004


BackgroundCurrently there is a lot of interest in the flexible framework offered by item banks for measuring patient relevant outcomes, including functional status. However, there are few item banks, which have been developed to quantify functional status, as expressed by the ability to perform activities of daily life.

MethodThis paper examines the psychometric properties of the AMC Linear Disability Score ALDS project item bank using an item response theory model and full information factor analysis. Data were collected from 555 respondents on a total of 160 items.

ResultsFollowing the analysis, 79 items remained in the item bank. The remaining 81 items were excluded because of: difficulties in presentation 1 item; low levels of variation in response pattern 28 items; significant differences in measurement characteristics for males and females or for respondents under or over 85 years old 26 items; or lack of model fit to the data at item level 26 items.

ConclusionsIt is conceivable that the item bank will have different measurement characteristics for other patient or demographic populations. However, these results indicate that the ALDS item bank has sound psychometric properties for respondents in residential care settings and could form a stable base for measuring functional status in a range of situations, including the implementation of computerised adaptive testing of functional status.

AbbreviationsALDSAMC Linear Disability Score

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Autor: Rebecca Holman - Robert Lindeboom - Marinus Vermeulen - Rob J de Haan


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