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Table 4 Univariate analysis between PVR and baseline characteristics

From: Hemosiderin-laden macrophages are an independent factor correlated with pulmonary vascular resistance in idiopathic pulmonary fibrosis: a case control study

Characteristics t ρ P-value
Age   0.230 0.020
Gender (male) −1.035   0.305
Smoking history (smokers) −1.279   0.207
BNP   −0.091 0.361
FVC, % pred   −0.124 0.211
DLCO,% pred   −0.518 < 0.001
PaO2   −0.424 < 0.001
PaCO2   −0.167 0.091
Six-minute walk distance   −0.583 < 0.001
Min-SpO2   −0.318 0.001
BALF-neutrophils, %   0.142 0.152
BALF-lymphocytes, %   0.098 0.325
BALF-eosinophils, %   0.113 0.255
HLM score   0.349 < 0.001
  1. Definitions of abbreviations: PVR pulmonary vascular resistance, t Student’s t, ρ Spearman’s correlation coefficient, BNP brain natriuretic peptide, FVC forced vital capacity, % pred percent of normal predicted value, D L CO diffusing capacity of the lung for carbon monoxide, PaO 2 partial pressure of oxygen in arterial blood, PaCO 2 partial pressure of carbon dioxide in arterial blood, min-SpO 2 minimum oxygen saturation during 6-min walk test, BALF bronchoalveolar lavage fluid, HLM hemosiderin-laden macrophage