The factor structure of the revised Illness Perception Questionnaire in a population of oesophageal cancer survivors
Article first published online: 8 FEB 2011
Copyright © 2011 John Wiley & Sons, Ltd.
Volume 21, Issue 5, pages 524–530, May 2012
How to Cite
Dempster, M. and McCorry, N. K. (2012), The factor structure of the revised Illness Perception Questionnaire in a population of oesophageal cancer survivors. Psycho-Oncology, 21: 524–530. doi: 10.1002/pon.1927
- Issue published online: 20 APR 2012
- Article first published online: 8 FEB 2011
- Manuscript Accepted: 8 JAN 2011
- Manuscript Revised: 5 JAN 2011
- Manuscript Received: 10 SEP 2010
- factor analysis;
- illness perceptions
Objectives: To determine whether the proposed seven-factor structure of the Illness Perception Questionnaire—Revised (Timeline Acute/Chronic, Timeline Cyclical, Consequences, Personal Control, Treatment Control, Illness Coherence and Emotional Representations) is appropriate among a population of oesophageal cancer survivors.
Methods: Everyone registered with the Oesophageal Patients' Association in the UK (n = 2185) was mailed a questionnaire booklet, which included the Illness Perception Questionnaire—Revised. Responses from 587 oesophageal cancer survivors (27%) were subjected to a confirmatory factor analysis.
Results: The proposed seven-factor structure provided a reasonable fit of the data. Modification indices suggested that a significantly better fit could be provided if one of the items on the Timeline Acute/Chronic factor loaded on the Treatment Control factor and an error covariance was added between two other items on the Timeline Acute/Chronic factor.
Conclusions: The model fit for the seven-factor structure proposed by Moss-Morris et al. (Psychol Health 2002;17:1–16) was found to be adequate in our study. However, the structure of the timeline acute/chronic factor needs to be considered, particularly when the IPQ-R is to be used among older people with a potentially life-threatening illness or those receiving palliative care. Copyright © 2011 John Wiley & Sons, Ltd.