Table 4.

Univariable logistic regression to predict patients with PH (mPAP ≥25 mmHg)

Variables (incremental change)	OR	95%CI	p	C-index	95%CI
Age (every 10 years)	0.69	0.51–0.94	0.02	0.40	0.33–0.47
PaO2 (every 10 mmHg)	0.64	0.50–0.81	<0.001	0.33	0.26–0.40
SaO2 (every 10 %)	0.36	0.22–0.58	<0.001	0.31	0.24–0.38
FVC (every 10 %)	1.20	1.01–1.42	0.04	0.56	0.48–0.63
TLC (every 10 %)	1.29	1.03–1.61	0.03	0.57	0.49–0.65
DLCOc (every 10 %)	0.63	0.45–0.86	0.004	0.37	0.28–0.46
FVC/DLCO ratio (every 0.1)	1.77	1.20–2.61	0.004	0.65	0.56–0.73
PA diameter (every 1 cm)	2.41	1.32–4.39	0.004	0.61	0.53–0.69
PA/AA ratio (every 0.1)	1.42	1.15–1.74	0.001	0.64	0.56–0.72
6MWD (every 10 m)	0.95	0.92–0.98	0.001	0.36	0.28–0.44
6MWD (every 10 %)	0.73	0.61–0.87	0.001	0.33	0.24–0.42
P axis (every 10 degrees)	1.26	1.09–1.46	0.002	0.60	0.53–0.68
P wave in D2 (every 0.1 mV)	1.73	1.07–2.79	0.03	0.58	0.51–0.66
QRS axis (every 10 degrees)	1.14	1.07–1.22	<0.001	0.62	0.55–0.70
T axis (every 10 degrees)	0.91	0.84–0.99	0.03	0.41	0.33–0.48
V1–V3 ST depression (Yes)	3.06	1.24–7.57	0.02
IRBBB (Yes)	2.61	1.18–5.74	0.02
RVSP (every 10 mmHg)	1.32	1.10–1.57	0.002	0.63	0.54–0.72
RV dilation (every 1 grade^)	1.96	1.31–2.93	0.001
RV function (every 1 grade^)	2.24	1.52–3.31	<0.001
RV basal diameter (per 1 cm)	1.71	1.11–2.64	0.02	0.60	0.51–0.69
RV mid diameter (per 1 cm)	1.59	1.05–2.39	0.03	0.57	0.48–0.66
RV longitudinal dimension (per 1 cm)	1.36	1.01–1.83	0.04	0.59	0.50–0.68

Abbreviations: 6MWD: distance walked in six minute walk test, AA: ascending aorta, DLCOc: corrected diffusion lung capacity of carbon monoxide, FVC: forced vital capacity, IRBBB: incomplete right bundle branch block, PA: pulmonary artery, PaO₂: partial arterial pressure of O₂, RV: right ventricle, RVSP: right ventricular systolic pressure, SaO₂: arterial O₂ saturation.

^{^}a change from normal to mild, mild to moderate or moderate to severe.