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

From: Validation of the Clinical COPD questionnaire in Italian language

  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**
  1. 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.