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Gepubliceerd in: Quality of Life Research 9/2018

07-06-2018

Procedures to develop a computerized adaptive test to assess patient-reported physical functioning

Auteurs: Erin McCabe, Douglas P. Gross, Okan Bulut

Gepubliceerd in: Quality of Life Research | Uitgave 9/2018

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Abstract

Purpose

The purpose of this paper is to demonstrate the procedures to develop and implement a computerized adaptive patient-reported outcome (PRO) measure using secondary analysis of a dataset and items from fixed-format legacy measures.

Methods

We conducted secondary analysis of a dataset of responses from 1429 persons with work-related lower extremity impairment. We calibrated three measures of physical functioning on the same metric, based on item response theory (IRT). We evaluated efficiency and measurement precision of various computerized adaptive test (CAT) designs using computer simulations.

Results

IRT and confirmatory factor analyses support combining the items from the three scales for a CAT item bank of 31 items. The item parameters for IRT were calculated using the generalized partial credit model. CAT simulations show that reducing the test length from the full 31 items to a maximum test length of 8 items, or 20 items is possible without a significant loss of information (95, 99% correlation with legacy measure scores).

Conclusions

We demonstrated feasibility and efficiency of using CAT for PRO measurement of physical functioning. The procedures we outlined are straightforward, and can be applied to other PRO measures. Additionally, we have included all the information necessary to implement the CAT of physical functioning in the electronic supplementary material of this paper.
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Voetnoten
1
More information about the study participant characteristics and the conditions under which data were collected is available in the original study publication [11].
 
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Metagegevens
Titel
Procedures to develop a computerized adaptive test to assess patient-reported physical functioning
Auteurs
Erin McCabe
Douglas P. Gross
Okan Bulut
Publicatiedatum
07-06-2018
Uitgeverij
Springer International Publishing
Gepubliceerd in
Quality of Life Research / Uitgave 9/2018
Print ISSN: 0962-9343
Elektronisch ISSN: 1573-2649
DOI
https://doi.org/10.1007/s11136-018-1898-0

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