Elsevier

Radiotherapy and Oncology

Volume 97, Issue 2, November 2010, Pages 294-300
Radiotherapy and Oncology

Quality of life
EORTC radiation proctitis-specific quality of life module – Pretesting in four European countries

https://doi.org/10.1016/j.radonc.2010.04.001Get rights and content

Abstract

Background and purpose

Radiation proctitis is a side effect which can occur after pelvic radiation therapy. Currently available questionnaires do not comprehensively assess the range of problems, nor impact on quality of life associated with proctitis. This article reports on the cultural testing phase of an EORTC module (QLQ-PRT21) developed to assess radiation proctitis specific issues and designed to be used in conjunction with the EORTC core quality of life questionnaire (QLQ-C30).

Methods

The previously developed 21-item module, pre-tested in Australia, was translated into Norwegian, German, French and Italian. Patients completed the EORTC QLQ-C30 and module questionnaires towards the end of their radical pelvic radiation treatment to target acute side effects. Patients experiencing chronic proctitis were also surveyed. Patients also participated in structured interviews to determine issues of comprehensibility, coverage and relevance. Results were compared with Australian data.

Results

Questionnaires were completed by 64 European patients. The module was found to be relevant and culturally acceptable to participants. Feedback has led to minor translation modifications and the inclusion of two additional questions.

Conclusion

This module is ready for Phase IV testing which will consist of large scale field testing with the aim to perform psychometric analysis and finalise a module that will be suitable in the assessment of radiation induced proctitis.

Section snippets

Methods and materials

The four stages for the development of EORTC modules include:

  • Phase I: Generation of quality of life issues.

  • Phase II: Construction of issues into a provisional questionnaire.

  • Phase III: Testing of the questionnaire for acceptability and relevance.

  • Phase IV Field testing in an international group of patients [19].

We have already reported the development of the module up to the point of International pretesting [18]. However, the module was developed only in English and tested in the Australian

Quantitative analysis

Individual items for the proctitis module responses were scored from 1 = not at all to 4 = very much. Data were entered into SPSS version 17 and analysed using descriptive statistics. Demographic data and mean scores for each item of the proctitis module were compared numerically with the Australian data previously collected. Participants’ responses to the interview questions were compiled into a table to determine what changes needed to be made to the translated questionnaires and whether all

Sample

Questionnaires and interviews were completed by 64 European patients. Their characteristics are recorded in Table 1. Nearly eighty percent (n = 50) of participants were male and 70% (n = 44) of the patients had prostate cancer. Patients recruited in Europe were significantly younger (mean age 67 years vs. 72 years, independent t-test p = 0.017), and more commonly undergoing treatment (64% vs. 46%, Chi Square test p > 0.05) than the assessed Australian cohort. Patients over the age of 80 were recruited in

Discussion

The international Phase III pretesting of the provisional proctitis module (EORTC QLQ-PRT21) has been successfully completed according to EORTC guidelines [19]. Minor modifications to the translated items were not considered sufficient to require further pretesting. The module is now identified as EORTC QLQ-PRT23 because two additional items have been identified for inclusion. The questionnaire will now proceed to phase IV testing.

In total, 92 patients participated in five counties (including

Conclusion

We have developed and pre-tested a proctitis module (EORTC QLQ-PRT23) that can be used in conjunction with the EORTC quality of life questionnaire. Following large scale field testing of this module, it is planned that this module will be suitable to be employed for the assessment of the endpoint of radiation induced proctitis.

Acknowledgements

This project was supported by an Edith Cowan University Industry Collaborative Grant. The authors wish to thank the EORTC QoL Group for their ongoing support and advice. The authors would also like to thank the staff who assisted with data collection in each of the countries involved and the patients who participated.

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