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Table 3 The correlation between PFT parameters and pulmonary hemodynamic parameters, CTA score at initial diagnosis

From: Vascular involvement in chronic thromboembolic pulmonary hypertension is associated with spirometry obstructive impairment

  %FEV1.0 %MMF %\({\dot{\text{V}}}\)50 %\({\dot{\text{V}}}\)25
r p r p r p r p
mPAP − 0.266 0.002* − 0.204 0.0177* − 0.271 0.0015* − 0.194 0.0244*
PVR − 0.284 0.0009** − 0.223 0.0096** − 0.241 0.0051 − 0.195 0.0245*
CO 0.127 0.1408 0.176 0.0410* 0.137 0.113 0.152 0.0797
CI 0.219 0.0109* 0.216 0.0121* − 0.186 0.0306* 0.229 0.0078**
CTA − 0.445 < 0.0001 − 0.203 0.0181* − 0.256 0.0028* − 0.132 0.127
  1. PFT, pulmonary function test; mPAP, mean pulmonary arterial pressure; PVR, pulmonary vascular resistance; CO, cardiac output; CI, cardiac index; CTA, CTA obstruction score; FEV1.0, forced expiratory volume in 1 second; FVC, forced vital capacity; MMF, maximal mid‒expiratory flow; \({\dot{\text{V}}}\)50 and \({\dot{\text{V}}}\)25: flow at 50,and 25% of vital capacity
  2. *p < 0.05; **p < 0.01