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dc.contributor.authorSmith, Adam B.
dc.contributor.authorWright, E.P
dc.contributor.authorRush, Robert
dc.contributor.authorStark, Dan
dc.contributor.authorVelikova, Galina
dc.contributor.authorSelby, P.J.
dc.date.accessioned2018-07-20T08:51:39Z
dc.date.available2018-07-20T08:51:39Z
dc.date.issued2006-12-14
dc.identifier.citationSmith, A., Wright, E., Rush, R., Stark, D., Velikova, G. & Selby, P. (2006) Rasch analysis of the dimensional structure of the Hospital Anxiety and Depression Scale, Psycho-Oncology, vol. 15, , pp. 817-827,
dc.identifier.issn10579249
dc.identifier.urihttps://eresearch.qmu.ac.uk/handle/20.500.12289/441
dc.identifier.urihttp://dx.doi.org/10.1002/pon.1015
dc.description.abstractThe Hospital Anxiety and Depression Scale (HADS) has been used extensively in cancer patients to identify psychological distress. Reports of the factor structure and screening performance of the instrument vary. Rasch models allow an assessment of the structure of a questionnaire by identifying item fit. Removal of misfitting items may improve both the dimensionality and efficacy of screening questionnaires. A Rasch analysis of the HADS-T and subscales was used to explore the factor structure, dimensionality and screening efficacy. A total of 1855 patients completed a touchscreen version of the HADS, including 381 patients who had received a psychiatric interview (SCAN/PSE). These data were analysed using Rasch models, and the screening efficacy at identifying cases of psychological distress and anxiety and depression evaluated. The results demonstrated that the structure of the HADS-T and subscales was unidimensional. Three items from the HADS-T, and one from each of the subscales demonstrated misfit. Screening efficacy for the HADS-T and subscales was modest. However, removal of misfitting items had little impact on screening, demonstrating that items could potentially be omitted, if required. The item range covered a narrow spectrum of psychological distress, predominantly higher levels of distress. Additional items have to be added if screening for moderate to mild distress is to be improved for cancer patients.
dc.format.extent817-827
dc.relation.ispartofPsycho-Oncology
dc.titleRasch analysis of the dimensional structure of the Hospital Anxiety and Depression Scale
dc.typearticle
dcterms.accessRightsrestricted
dc.description.facultyNO DIVISION
dc.description.volume15
dc.identifier.doidoi:10.1002/pon.1015
dc.description.ispublishedpub
dc.description.eprintid441
rioxxterms.typearticle
rioxxterms.publicationdate14/12/2006
qmu.authorRush, Robert
dc.description.statuspub
dc.description.number9


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