Objectives The Seattle Angina Questionnaire (SAQ) was widely used and well validated in the westercountries. We aimed at validated the reliability and validity of its Chinese version, which is called the Simplified Chinese version of SAQ (SC-SAQ).
Methods SAQ was translated into Chinese according to the principles of psychometrics. Patients who went to our clinics presented with an angina completed SC-SAQ and SF-12. ECG, cTnI, coronary CTA, and cardiac angiography were performed where necessary.
Results One hundred and ninety-one patients completed the study. The Cronbach's α and test-retest reliability of SC-SAQ was 0.92 and 0.98 respectively. Criteria validity was demonstrated with positive correlation of SC-SAQ with SF-12. Confirmed factor analysis (CFA) of SC-SAQ showed good construction validity.
Conclusions The Simplified Chinese version of SAQ (SC-SAQ) is reliable and valid condition-specific health-related quality of life questionnaire for CHD patients.