Table 2– Correlations between changes in exercise capacity and changes in patient-reported outcomes
MeasurementCorrelation with change in 6MWD from beginning to end of rehabilitationCorrelation with change in MCEC from beginning to end of rehabilitationCorrelation with change in 6MWD from end of rehabilitation to 6-month follow-upCorrelation 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.