1. Reliability and responsiveness of a prostate cancer questionnaire for radiotherapy-induced side effects.
- Author
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Fransson P, Tavelin B, and Widmark A
- Subjects
- Aged, Erectile Dysfunction etiology, Erectile Dysfunction psychology, Humans, Intestinal Diseases etiology, Intestinal Diseases psychology, Male, Middle Aged, Reproducibility of Results, Urination Disorders etiology, Urination Disorders psychology, Prostatic Neoplasms psychology, Prostatic Neoplasms radiotherapy, Quality of Life, Radiotherapy adverse effects, Surveys and Questionnaires standards
- Abstract
Few self-assessment cancer-specific questionnaires/modules have yet been developed for radiotherapy-induced side effects. The aim of the present study was to test the reliability and responsiveness of a prostate cancer (PC)-specific questionnaire. Thirty-one patients with PC graded their urinary and intestinal symptoms and their sexual function on the questionnaire. A doctor and a nurse performed a structured interview and graded the patient's symptoms with the same questions. The procedure was performed at both the start and the end of the treatment. A high concordance regarding symptom detection was seen between the patient, nurse and the doctor. The inter-rater test shows intraclass correlation coefficient (ICC) values above 0.60 in all scales. The internal reliability exceeded the lower limit (Cronbach a >0.70) for all scales. The test-retest gave acceptable reliability for all scales (ICC > or = 0.60). All scales indicated increased problems during radiotherapy. The questionnaire was proven to be valid for the evaluations of urinary and intestinal problems and for sexual function in PC patients.
- Published
- 2001
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