Table 2

Correlations between desaturation and parameters of fitness during cardiopulmonary exercise testing in patients with interstitial lung disease

Nadir SpO2ΔSpO2
VO2peak (L/min)r=0.36, p=0.003r=0.30, p=0.016
VO2peak (mL/kg/min)r=0.34, p=0.005r=0.29, p=0.017
VO2peak (mL/kgFFM/min)r=0.32, p=0.009r=0.25, p=0.044
VO2peak (%Predicted)r=0.23, p=0.057r=0.19, p=0.137
WRpeak (W)r=0.34, p=0.004r=0.30, p=0.014
WRpeak (W/kg)r=0.33, p=0.006r=0.31, p=0.011
WRpeak (%Predicted)r=0.31, p=0.010r=0.30, p=0.023
  • Values presented are Pearson’s correlation coefficients for n = 67 successfully completed CPETs.

  • FFM, fat free mass; SpO2, peripheral capillary oxygen saturation; VO2peak, peak oxygen uptake; WRpeak, peak work rate.