Table 3 Correlation coefficients between baseline exercise tests and SGRQ scores
CET time6MWTSGRQ SymptomsSGRQ ActivitySGRQ ImpactSGRQ Total
CET time×0.19*−0.08−0.21*−0.15−0.18*
6MWT–×0.05−0.41†−0.26‡−0.28§

  • CET, constant work rate cycle endurance test; 6MWT, 6-min walking test, SGRQ, St George Respiratory Questionnaire.

  • *p<0.05; †p<0.0001; ‡p<0.005; §p<0.0005.