The Iranian version of Angina Pectoris characteristics questionnaire: reliability assessment

AIMS: To evaluate internal consistency and test-retest reliability of the Iranian version of the Angina Pectoris characteristics questionnaire. BACKGROUND: To evaluate symptoms in patients with Angina Pectoris, the Iranian version of the Angina Pectoris characteristics questionnaire was created by combining items from Modified Rose Questionnaire, Short Form-McGill Questionnaire and the Accompanying Symptom Checklist. The Angina Pectoris characteristics questionnaire has been developed and validated recently although it required assessment of its reliability. DESIGN: Reliability study using test and retest. METHOD: One hundred and ten coronary heart disease patients with Angina Pectoris were included. The test-retest reliability of the instrument was estimated for measurement after 15 days. RESULT: The analysis of the result indicated that internal consistency was found adequate at both assessments (Cronbach's alpha = 0.65) for test and retest. There was no significant difference between test and retest. The intra-class correlation coefficient ranged from 0.76-0.98. CONCLUSION: The Angina Pectoris characteristics questionnaire is a reliable instrument for the assessment of Angina Pectoris characteristics in a Persian population. RELEVANCE TO CLINICAL PRACTICE: The Angina Pectoris characteristics questionnaire can be used with confidence in Iranian coronary heart disease patients for Assessing Angina Pectoris symptom.