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Table 4 Bivariate correlations of steps, AEE, PA 3 and PAL with CAT, mMRC, FEV 1 %predicted and exacerbations (n = 78)

From: Differences in classification of COPD patients into risk groups A-D: a cross-sectional study

Variable CAT score mMRC score1 Exacerbations FEV1%predicted2
  r p r p r p r p
Steps −0.37 <0.001 −0.51 <0.001 −0.23 0.021 0.42 <0.001
AEE [cal] −0.24 0.016 −0.30 0.006 −0.05 0.332 0.13 0.136
PA3 [min] −0.25 0.014 −0.27 0.011 0.02 0.430 0.05 0.337
PAL [METs] −0.18 0.058 −0.21 0.038 0.02 0.441 0.02 0.449
  1. AEE, active energy expenditure; CAT, COPD assessment test; FEV1%predicted, forced expiratory volume in 1 s in % of predicted; MET, metabolic equivalent; mMRC, modified Medical Research Council; p, probability level; PAL, physical activity level; PA3, physical activity duration above 3 METs; r, correlation coefficient. Significant p-values are highlighted in bold. 1(n = 71); 2(n = 77).