Abstract:Objective:To explore the clinical application of the CAT scale in the evaluation of the health status of chronic obstructive pulmonary disease (COPD) patients in stable stage. Methods:A simple sampling survey of 104 cases of COPD patients in stable stage was enrolled. All participants were examined with CAT score,dyspnea index(mMRC),6-minute-walk test and pulmonary function test. Analysis on the correlation between CAT score and these test results was executed by Pearson correlation, and stepwise regression. Results:The associations between CAT score and FEV1%pred,6MWD,mMRC score were significant(P < 0.01). Using stepwise regression,CAT score = 30.11 + 3.00 × mMRC dyspnoea score + 0.002 × exacerbation -0.03 × 6MWD (r2 = 0.67,P < 0.001). Conclusion: The CAT scale is reliable for the assessment of the quality of life and the frequency of exacerbations can seriously impact the patients’ health status.