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Table 4 Results of the cardiopulmonary exercise testing (CPET) in the study population (n = 25) in total as well as divided in groups based on the MRC score (0-1, 2, 3-4).

From: MRC chronic Dyspnea Scale: Relationships with cardiopulmonary exercise testing and 6-minute walk test in idiopathic pulmonary fibrosis patients: a prospective study

     MRC
  Total 0-1 2 3-4
  N Mean SD N Mean SD N Mean SD N Mean SD
VO2 peak (ml/min) 25 1233.28 437.61 10 1391.80 305.87 8 1307.75 573.62 7 921.71 281.54
VO2 peak (%) 24 73.38 19.11 9 83.89 15.02 8 70.00 20.71 7 63.71 17.56
VO2 peak/kg (ml/kg/min) 25 15.46 3.90 10 18.38 2.68 8 14.49 3.24 7 12.41 3.40
AT (ml/kg/min) 21 11.57 3.48 10 12.97 2.68 5 11.36 2.95 6 9.42 4.36
Oxygen pulse (ml/beat) 25 9.19 2.83 10 10.16 2.31 8 9.51 3.36 7 7.44 2.35
Oxygen pulse (%) 24 78.17 22.62 9 92.22 23.69 8 70.25 14.27 7 69.14 22.36
SPO2 peak 25 87.72 5.68 10 93.00 3.62 8 84.00 3.30 7 84.43 4.39
VE peak (L/min) 25 54.20 17.52 10 56.20 15.82 8 54.50 19.26 7 51.00 20.03
VE peak (%) 24 78.08 19.72 9 75.89 17.07 8 72.50 15.43 7 87.29 26.01
BR peak % 25 27.32 21.18 10 36.00 17.96 8 25.75 22.18 7 16.71 21.82
VE/VCO2 25 40.00 13.52 10 29.00 6.32 8 43.13 12.03 7 52.14 10.75
HR reserve 25 19.20 17.99 10 20.20 22.11 8 19.00 17.17 7 18.00 14.62
HR recovery 25 14.48 8.30 10 19.39 5.76 8 13.25 10.48 7 8.86 4.34
VE/VCO2 at AT 21 41.00 10.46 10 35.10 3.84 5 39.20 7.66 6 52.33 11.71
VT/IC 25 0.81 0.14 10 0.82 0.15 8 0.82 0.07 7 0.80 0.21
Borg scale at peak exercise 25 4.84 2.30 10 3.00 1.83 8 6.75 1.17 7 5.29 1.98
  1. All values are shown as mean ± standard deviation (SD)
  2. VO2 peak oxygen uptake at peak exercise, AT anaerobic threshold, SPO2 oxygen saturation, VE peak minute ventilation at peak exercise, VE/VCO2 slope: slope of relationship between VE and VCO2, HR Heart rate, VT tidal volume, IC Inspiratory capacity