Validation of the Clinical COPD questionnaire in Italian language

Table 3 Correlations between CCQ, SF-36, FEV₁ and functional dyspnoea

	CCQ Symptom	CCQ Functional state	CCQ Mental state	CCQ Total
SF-36 Physical functioning	-0.51**	-0.78**	-0.45**	-0.72**
SF-36 Social functioning	-0.36*	-0.40**	-0.40**	-0.43**
SF-36 Role physical	-0.34*	-0.38**	-0.43**	-0.43**
SF-36 Role emotional	-0.31*	-0.30*	-0.39*	-0.36*
SF-36 Mental health	-0.35*	-0.47**	-0.54**	-0.48**
SF-36 Vitality	-0.47**	-0.58**	-0.44**	-0.57**
SF-36 Pain	-0.15	-0.23	-0.05	-0.20
SF-36 Health perceptions	-0.56**	-0.58**	-0.49**	-0.64**
MRC functional dyspnoea	+0.52**	+0.64**	+0.44**	+0.63**
FEV₁ (% predicted)	-0.51**	-0.50**	-0.51**	-0.57**

SF-36 = Medical Outcome Survey Form-36 (higher score indicates better health status); FEV₁ = forced expired volume in one second; MRC = Medical Research Council functional dyspnoea; *p < 0.05; **p < 0.01, Spearman's rank correlation.

ISSN: 1477-7525