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Table 3 Correlation between FEV1 % of predicted, AIx75, and cf-PWV in studied COPD patients

From: Arterial stiffness can occur early in mild-to-moderate chronic obstructive pulmonary disease

  FEV1 % of predicted
r P value
AIx75 − 0.84 < 0.001**
cf-PWV (m/s) − 0.85 < 0.001**
  1. COPD chronic obstructive pulmonary disease, FEV1 forced expiratory volume in 1 s, cf-PWV carotid-femoral pulse wave velocity, AIx75 augmentation index normalized to a standard heart rate of 75 beats per min, r Pearson’s correlation coefficient test
  2. **Highly significant