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Table 3 Comparison of the different studies in the literature that assessed the health related quality by CRQ-SAS and the current one

From: The reliability of an arabic version of the self-administered standardized chronic respiratory disease questionnaire (CRQ-SAS)

Study Year Country FEV1 Dyspnea Fatigue Emotions Mastery
Williams et al [10] 2001 UK 1.13 L 2.4 3.3 4.4 4.2
Puhan et al [12] 2004 Multinational 45.1% 3.6 3.8 4.1 4.25
Schunemann et al [13] 2005 Canada/USA 45.4% 4.1 3.9 4.7 4.6
Oh et al [23] 2009 Korea 52.3% 4.4 4.0 4.6 5.2
Al-Moamary et al (current study) 2009 Saudi Arabia 58.4% 4.9 4.6 5.0 5.2