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Table 6 Characteristics of subjects with Logit(P) < 0.716 and Logit(P) > 0.716 calculated by the predication equation in validation set

From: Cardiopulmonary exercise testing and pulmonary function testing for predicting the severity of CTEPH

Variables Logit(P) < 0.716 Logit(P) > 0.716 P
Age (years) 54.0 ± 13.0 60.8 ± 6.7 0.102
Sex, n (female/male) 14/5 7/5 0.075
Height (m) 1.6 ± 0.1 1.6 ± 0.1 0.348
Weight (kg) 61.2 ± 10.2 66.4 ± 10.9 0.187
Body mass index (kg/m2) 23.7 ± 3.8 24.5 ± 2.6 0.501
WHO classification II/III/IV, n 10/9/0 2/9/1 0.082
NT-proBNP (pg/mL) 203.0 (79.0,634.0) 1305.0 (659.0,2284.0) 0.002
PAP (mm Hg) 36.3 ± 11.7 53.0 ± 4.6 < 0.0001
PAWP (mm Hg) 7.5 ± 3.7 6.3 ± 2.6 0.338
CO (L/min) 4.9 ± 1.0 4.2 ± 1.0 0.075
CI (L/min/m2) 3.0 ± 0.5 2.5 ± 0.5 0.017
PVR (wood u) 6.3 ± 2.6 11.5 ± 3.6 < 0.0001
RAP (mm Hg) 3.0 (2.0,5.0) 7.5 (3.5,8.8) 0.045
VE @ AT (L/min) 26.0 ± 6.4 35.6 ± 7.1 0.001
VO2 @ Peak (mL/kg/min) 13.8 ± 2.7 11.1 ± 1.8 0.005
  1. The data are presented as mean ± SD, median (interquartile range), or n. Statistical analysis of characteristics of “Logit(P) < 0.716” and “Logit(P) > 0.716” was analyzed with Unpaired t test, Mann–Whitney U test or chi-square test, and was presented as “P”. WHO = World Health Organization; BNP = brain natriuretic peptide; PAP = pulmonary artery pressure; PAWP = pulmonary arterial wedge pressure; CO = cardiac output; CI = cardiac index; PVR = pulmonary vascular resistance; RAP = right atrial pressure; VE = minute ventilation; VO2 = oxygen uptake