Table 2– Correlations between changes in exercise capacity and changes in patient-reported outcomes
 Measurement Correlation with change in 6MWD from beginning to end of rehabilitation Correlation with change in MCEC from beginning to end of rehabilitation Correlation with change in 6MWD from end of rehabilitation to 6-month follow-up Correlation with change in MCEC from end of rehabilitation to 6-month follow-up SGRQ total score -0.15 -0.11 -0.46 -0.49 SGRQ activities -0.11 -0.10 -0.46 -0.48 SGRQ impact -0.15 -0.08 -0.40 -0.43 SGRQ symptoms -0.02 -0.06 -0.18 -0.19 SOBQ total score -0.13 -0.14 -0.51 -0.50
• 6MWD: 6-min walk distance; MCEC: maximal cycle exercise capacity; SGRQ: St George's Respiratory Questionnaire; SOBQ: University of California San Diego Shortness of Breath Questionnaire. Bold represents correlations ≥0.3, justifying anchor-based estimates.