Table 4.

Optimal cut off values of different parameters for PH prediction

Parameter	Cut off	Specificity	Sensitivity	PPV	NPV
Age (years)	53	0.85	0.76	0.79	0.81
Pack-years	1.75	0.69	0.61	0.58	0.71
6MWD (m)	507.5	0.76	0.63	0.68	0.72
Sat 0 (%)	96	0.76	0.68	0.69	0.75
Sat 6 (%)	93	0.75	0.65	0.67	0.73
Desaturation (%)	4	0.71	0.65	0.63	0.72
DLCO (% pred)	68	0.67	0.78	0.65	0.79
TLC/DLCO	1.67	0.92	0.65	0.87	0.77
NT-proBNP (pg/ml)	38	0.49	0.77	0.54	0.74

DLCO diffusion lung capacity for carbon monoxide, 6MWD 6-min walk distance, NT-proBNP N-terminal brain natriuretic peptide, PH pulmonary hypertension, Sat0 baseline room air oxygen saturation, Sat6 sixth minute room air oxygen saturation, TLC/DLCO total lung capacity% predicted/diffusion lung capacity for carbon monoxide corrected for haemoglobin % predicted