Table 4 Correlation coefficients between pre- and post-rehabilitation changes (Δ) in exercise tests and SGRQ scores
ΔCET timeΔ6MWTΔSGRQ SymptomsΔSGRQ ActivityΔSGRQ ImpactΔSGRQ Total
ΔCET time×0.05−0.10−0.23*−0.28†−0.31‡
Δ6MWT×−0.010.04−0.15−0.09
  • CET, constant work rate cycle endurance test; 6MWT, 6-min walking test, SGRQ, St George Respiratory Questionnaire.

  • *p<0.001; †p<0.0005; ‡p<0.0001.