Table 4.

Correlations between CCQ and SGRQ in patients with COPD (n = 38)

	Clinical COPD Questionnaire
	Symptom	Functional state	Mental state	Total
SGRQ
Symptoms	0.75**	0.49**	0.60**	0.72**
Activity	0.25	0.69**	0.52**	0.53**
Impact	0.47**	0.69**	0.61**	0.67**
Total	0.51**	0.75**	0.67**	0.71**

SGRQ = St. George Respiratory Questionnaire (higher score indicates worse HRQOL) * P < 0.05; ** P < 0.01, Spearman's rank correlation.