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[Reliability and validity of the chronic obstructive pulmonary disease morning symptom diary Chinese version]
1Pulmonary and Critical Care Medicine, the Second Xiangya Hospital, Central South University, Changsha 410011, China.
Abstract:
Objective: To describe the development of the Chronic Obstructive Pulmonary Disease Morning Symptom Diary (COPD-MSD) Chinese version and to test its reliability and validity. Methods: The COPD-MSD Chinese version was developed by the standard cross-cultural translation principle. A hundred and eight patients with COPD in stable condition from the Second Xiangya Hospital were assessed by interview with COPD-MSD Chinese version, and underwent mMRC, CAT scores and pulmonary function test.The reliability and validity were evaluated by performing correlation analysis.The stages of COPD determined by lung function were compared to observe the value of COPD-MSD Chinese version in determining disease severity. Results: The Cronbach's alpha and retest reliability of the total scale were 0.908 and 0.927, respectively.The explanatory factor analysis was conducted using orthogonal rotation through the maximum variation principle components extraction which revealed the presence of 5 components with eigen values exceeding 1, explaining totally 74.257% of the variance, and the total score of the COPD-MSD Chinese version was significantly correlated with the mMRC and CAT scores (r=0.44 and 0.56,P<0.01), indicating that the scale of the convergence validity was good. The COPD-MSD Chinese version scores varied significantly in patients with different severity of COPD(χ(2)=9.808, P<0.05). Conclusion: The COPD-MSD Chinese version showed good reliability and validity and could be used in clinical assessment of morning symptoms in Chinese COPD patients.
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