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An emotional functioning item bank of 24 items for computerized adaptive testing (CAT) was established

An emotional functioning item bank of 24 items for computerized adaptive testing (CAT) was established
An emotional functioning item bank of 24 items for computerized adaptive testing (CAT) was established
Objective

To improve measurement precision, the European Organisation for Research and Treatment of Cancer (EORTC) Quality of Life Group is developing an item bank for computerized adaptive testing (CAT) of emotional functioning (EF). The item bank will be within the conceptual framework of the widely used EORTC Quality of Life questionnaire (QLQ-C30).

Study Design and Setting

On the basis of literature search and evaluations by international samples of experts and cancer patients, 38 candidate items were developed. The psychometric properties of the items were evaluated in a large international sample of cancer patients. This included evaluations of dimensionality, item response theory (IRT) model fit, differential item functioning (DIF), and of measurement precision/statistical power.

Results

Responses were obtained from 1,023 cancer patients from four countries. The evaluations showed that 24 items could be included in a unidimensional IRT model. DIF did not seem to have any significant impact on the estimation of EF. Evaluations indicated that the CAT measure may reduce sample size requirements by up to 50% compared to the QLQ-C30 EF scale without reducing power.

Conclusion

On the basis of thorough psychometric evaluations, we have established an EF item bank of 24 items. This will allow for more precise and flexible measurement of EF, while maintaining backward compatibility with the QLQ-C30 EF scale.
computerized adaptive testing, EORTC QLQ-C30, emotional functioning, item response theory, oncology, patient-reported outcome
1-11
Petersen, Morten Aa.
784e6000-d637-4607-9665-1105381e59d1
Gamper, Eva-Maria
f411c085-bc17-493e-8fb9-07b3189a9b0a
Costantini, Anna
dd05d191-a06c-40a7-b3d4-c91b38716fb8
Giesinger, Johannes M.
71e4f064-9f9a-4c34-a666-df0c3056a93f
Holzner, Bernhard
2dbb757c-77c4-4ea2-b983-c290bb721c4d
Johnson, Colin
e50aa9cd-8c61-4fe3-a0b3-f51cc3a6c74a
Sztankay, Monika
ffbc9628-afc5-4562-84db-b7a7516a1b56
Young, Teresa
0fc82d81-c178-4a81-89d8-6a5cc2e52627
Groenvold, Mogens
5b95b2af-3c57-44c3-9129-1ec98b6e6cdf
Petersen, Morten Aa.
784e6000-d637-4607-9665-1105381e59d1
Gamper, Eva-Maria
f411c085-bc17-493e-8fb9-07b3189a9b0a
Costantini, Anna
dd05d191-a06c-40a7-b3d4-c91b38716fb8
Giesinger, Johannes M.
71e4f064-9f9a-4c34-a666-df0c3056a93f
Holzner, Bernhard
2dbb757c-77c4-4ea2-b983-c290bb721c4d
Johnson, Colin
e50aa9cd-8c61-4fe3-a0b3-f51cc3a6c74a
Sztankay, Monika
ffbc9628-afc5-4562-84db-b7a7516a1b56
Young, Teresa
0fc82d81-c178-4a81-89d8-6a5cc2e52627
Groenvold, Mogens
5b95b2af-3c57-44c3-9129-1ec98b6e6cdf

Petersen, Morten Aa., Gamper, Eva-Maria, Costantini, Anna, Giesinger, Johannes M., Holzner, Bernhard, Johnson, Colin, Sztankay, Monika, Young, Teresa and Groenvold, Mogens (2015) An emotional functioning item bank of 24 items for computerized adaptive testing (CAT) was established. Journal of Clinical Epidemiology, 1-11. (doi:10.1016/j.jclinepi.2015.09.002). (PMID:26363341)

Record type: Article

Abstract

Objective

To improve measurement precision, the European Organisation for Research and Treatment of Cancer (EORTC) Quality of Life Group is developing an item bank for computerized adaptive testing (CAT) of emotional functioning (EF). The item bank will be within the conceptual framework of the widely used EORTC Quality of Life questionnaire (QLQ-C30).

Study Design and Setting

On the basis of literature search and evaluations by international samples of experts and cancer patients, 38 candidate items were developed. The psychometric properties of the items were evaluated in a large international sample of cancer patients. This included evaluations of dimensionality, item response theory (IRT) model fit, differential item functioning (DIF), and of measurement precision/statistical power.

Results

Responses were obtained from 1,023 cancer patients from four countries. The evaluations showed that 24 items could be included in a unidimensional IRT model. DIF did not seem to have any significant impact on the estimation of EF. Evaluations indicated that the CAT measure may reduce sample size requirements by up to 50% compared to the QLQ-C30 EF scale without reducing power.

Conclusion

On the basis of thorough psychometric evaluations, we have established an EF item bank of 24 items. This will allow for more precise and flexible measurement of EF, while maintaining backward compatibility with the QLQ-C30 EF scale.

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More information

Accepted/In Press date: 7 September 2015
e-pub ahead of print date: 9 September 2015
Keywords: computerized adaptive testing, EORTC QLQ-C30, emotional functioning, item response theory, oncology, patient-reported outcome
Organisations: Faculty of Medicine

Identifiers

Local EPrints ID: 383670
URI: http://eprints.soton.ac.uk/id/eprint/383670
PURE UUID: 3f7859bd-9d88-4b74-a13b-26322a74126f

Catalogue record

Date deposited: 10 Nov 2015 09:52
Last modified: 06 Oct 2020 23:34

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Contributors

Author: Morten Aa. Petersen
Author: Eva-Maria Gamper
Author: Anna Costantini
Author: Johannes M. Giesinger
Author: Bernhard Holzner
Author: Colin Johnson
Author: Monika Sztankay
Author: Teresa Young
Author: Mogens Groenvold

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