Table 5.

Univariable analysis to predict patients with precapillary PH (PVR > 3 Wood Units)

Variables (incremental change)	OR	95%CI	p	C-index	95%CI
PaO2 (every 10 mmHg)	0.62	0.47–0.82	0.001	0.32	0.24–0.40
SaO2 (every 10 %)	0.39	0.25–0.62	<0.001	0.30	0.21–0.38
TLC (every 10 %)	1.32	1.06–1.67	0.02	0.58	0.49–0.68
DLCOc (every 10 %)	0.52	0.35–0.78	0.001	0.34	0.25–0.43
FVC/DLCOc (every 0.1)	2.20	1.47–3.32	<0.001	0.69	0.59–0.78
PA diameter (every 1 cm)	2.84	1.50–5.40	0.001	0.65	0.56–0.74
PA/AA diameter ratio (every 0.1)	1.60	1.27–2.00	<0.001	0.69	0.60–0.77
6MWD (every 10 m)	0.96	0.92–0.99	0.006	0.38	0.29–0.46
6MWD %predicted (every 10 %)	0.70	0.57–0.87	0.001	0.31	0.21–0.41
P axis (every 10 degrees)	1.22	1.03–1.44	0.02	0.60	0.51–0.68
P wave in lead II (every 0.1 mV)	2.26	1.35–3.79	0.002	0.65	0.57–0.73
QRS axis (every 10 degrees)	1.21	1.12–1.30	<0.001	0.69	0.61–0.77
T axis (every 10 degrees)	0.90	0.82–1.00	0.04	0.40	0.32–0.49
V1–V3 ST depression (Yes)	3.60	1.58–8.21	0.002
IRBBB (Yes)	4.19	1.95–9.03	<0.001
RVSP (every 10 mmHg)	1.46	1.21–1.76	<0.001	0.68	0.58–0.78
RV dilation (every 1 grade^)	2.39	1.59–3.61	<0.001
RV function (every 1 grade^)	2.85	1.92–4.23	<0.001
RV basal diameter (per 1 cm)	1.68	1.08–2.60	0.02	0.61	0.52–0.71
RV mid diameter (per 1 cm)	1.81	1.18–2.78	0.007	0.62	0.52–0.72

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

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