关键词: 冠心病, 患者报告结局, 信度

Abstract: Background　Coronary heart disease is difficult to cure，and the course of which is long.Traditional evaluation indexes （such as mortality and cure rate） cannot evaluate the health status and treatment effect on patients.Patient reported outcome is the direct evaluation of patients' own health status without interpretation of medical professionals.The key to the assessment of patient reported outcome is to develop an appropriate measurement scale and evaluate it accordingly．Objective　To evaluate the reliability of the Patient Reported Outcome Instruments for Chronic Disease （PROISCD-CHD）．Methods　To evaluate the reliability of PROISCD-CHD by classical test theory （CTT） and modern test theory （Generalizability Theory，GT），a total of 189 patients with coronary heart disease who were literate and volunteered were investigated at the time of admission and 75 of them were randomly selected for the second survey after one day interval.The correlation coefficients of the first and second measurements were used to evaluate the test-retest reliability while Cronbach's α coefficients were used to evaluate internal consistency.The source of the patient's reported outcome score was explored in G-study and the suggested number of items was given based on their G-coefficient （Ep2） and indexes of dependability （φ） in D-study．Results　Coefficients of physiological health，mental health，social health，spirit/belief health，common modules，specific modules and total score of PROISCD-CHD scale were 0.89，0.84，0.75，0.86，0.88，0.89，0.71，respectively （P<0.001），and Cronbach's α coefficients of each item were 0.71，0.75，0.75，0.69，0.88，0.78，0.89，respectively.G-study showed that the biggest source of variation was the interaction between the patients and items，and the smallest was the item.D-study revealed that G-coefficients of all domains were greater than 0.70，except for the domain of spirit/belief health，which had the same result with the reliability analysis of classical test theory.And according to Ep2 andφ，the optimal number of items was also given．Conclusion　PROISCD-CHD can be used to assess patient-reported outcome for patients with coronary heart disease with good reliability.

Key words: Coronary disease, Patient reported outcome, Reliability