Table 2.

Numbers (%) of patients with suspected pulmonary hypertension, decreased diffusion capacity, and confirmed pulmonary hypertension at right-heart catheterization in the French and Italian samples, separately and combined.

Sample
French, n = 467Italian, n = 698p*Combined, n = 1165
Pulmonary arterial systolic pressure > 40 mm Hg on echocardiography, n (%)57 (12)88 (13)0.68145 (12)
DLCO < 50% predicted without pulmonary fibrosis, n (%)18 (4)29 (4)0.9047 (4)
Unexplained dyspnea, n (%)5 (1)9 (1)0.9014 (1)
Pulmonary hypertension, n (%)32 (7)51 (7)0.9083 (7)
Precapillary pulmonary hypertension at right-heart catheterization, n (%)25 (5)39 (6)0.5564 (5)
Postcapillary pulmonary hypertension at right-heart catheterization, n (%)5 (1)12 (2)0.4017 (1)
Pulmonary venoocclusive disease, n (%)2 (0.3)0 (0)0.902 (0.1)
  • * French versus Italian sample. DLCO: carbon monoxide diffusion capacity.