Table 4.

Positive and Negative predictive values of combination of TTE and PFT parameters

	eRVSP>35mmHg				eRVSP >40mmHg				eRVSP > 45mmHg				eRVSP > 50mmHg
PFT parameters	PPV	NPV	Sens	Spec	PPV	NPV	Sens	Spec	PPV	NPV	Sens	Spec	PPV	NPV	Sens	Spec
FVC%/DLCO%≥1.6	0.433	0.978	0.970	0.512	0.508	0.982	0.970	0.638	0.508	0.966	0.940	0.649	0.513	0.951	0.910	0.669
FVC%/DLCO%≥1.8	0.455	0.980	0.970	0.551	0.546	0.984	0.970	0.689	0.553	0.969	0.940	0.707	0.560	0.948	0.896	0.730
FVC%/DLCO%≥2.0	0.492	0.982	0.970	0.615	0.643	0.986	0.970	0.793	0.655	0.947	0.882	0.822	0.687	0.937	0.851	0.851
DLCO < 60%	0.436	0.978	0.970	0.517	0.500	0.982	0.970	0.626	0.500	0.965	0.940	0.649	0.508	0.966	0.940	0.649
DLCO < 70%	0.369	0.969	0.970	0.362	0.406	0.975	0.970	0.454	0.403	0.963	0.955	0.454	0.408	0.964	0.955	0.465

eRVSP= estimated right ventricular systolic pressure in mmHg FVC/DLCO= Forced vital capacity/diffusion of the lung for carbon monoxide percent predicted ratio, DLCO= diffusion capacity for the lung percent predicted. PPV= positive predictive value, NPV= negative predictive value, Sens= sensitivity, Spec= specificity.