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Table 2 Spearman’s Correlation of ESWT with possible anchors

From: Changes in the endurance shuttle walk test in COPD patients with chronic respiratory failure after pulmonary rehabilitation: the minimal important difference obtained with anchor- and distribution-based method

  ΔESWT (s) ΔESWT (%) ΔESWT (m)
∆ Wpeak, W 0.568 0.525 0.610
∆ CRQ total 0.449 0.441 0.428
∆ CRQ dyspnoea 0.313 0.299 0.305
∆ CRQ fatigue 0.373 0.328 0.350
∆ CRQ emotion 0.363 0.351 0.353
∆ CRQ mastery 0.389 0.338 0.381
∆ 6MWD, m 0.307 0.318 0.275
  1. Values printed bold p < 0.05.
  2. Wpeak: peak work rate; CRQ: Chronic Respiratory Questionnaire; 6MWD: six minute walking distance; ΔESWT: change in endurance shuttle walking test.