Table 2 Correlations between selected clinical, laboratory and functional data and NT-proCNP levels in COPD patients.

From: NT-proCNP as a new biomarker of pulmonary hypertension in patients with COPD

Variable

Correlation coefficient

P value

Age, years

0.05

0.67

mMRC, points

0.42

0.001

CAT, points

0.60

< 0.001

FEV1, % predicted

− 0.40

0.001

FVC, % predicted

− 0.22

0.08

FEV1/FVC, %

− 0.12

0.24

SpO2, %

− 0.47

0.001

6-MWD, m

− 0.30

0.004

Fibrinogen, mg/L

0.45

0.001

CRP, mg/L

0.46

0.001

SPAP, mmHg

0.77

< 0.001

  1. CAT, COPD assessment test; FEV1, forced expiratory volume at 1 s; FVC, forced vital capacity; SpO2, oxygen saturation; 6MWD, distance in 6-minute walk test; CRP, C-reactive protein; SPAP, pulmonary artery systolic pressure.
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