ArticleAuthors: Nguyen Thanh Ha (2019)
Results showed that in the pilot test, irrelevant words related to differing cultural contexts were refined. Reproducibility between two administrations of SGRQ-C was high. The Cronbach’s alpha coefficient had high values exceeding 0.7 for all components (symptom: 0.822, activity: 0.910, impact: 0.948). The intra-class correlation coefficients for total and component scores were high (ranging from 0.722 to 0.834). Conclusion: The SGRQ-C performs well as a QoL instrument in Vietnamese patients with COPD. 
