Table 3.

Studies included into analysis according to the definition of PAH/PH.

Definition of PAH/PH	No. of Studies Included into Analysis/Analyzed (% of studies included)	References
A1	5 (14)	3, 4, 13†**, 14, 19
A2	6 (17)	1, 13, 17, 34, 40*, 41
B1	0
B2	3 (8.6)	18, 21, 22
C1	0
C2	14 (40)	2, 12, 15, 23–27, 29, 33, 35, 37–39
D1	0
D2	9 (26)	16, 20, 28, 30–32, 35**, 36, 42
Total	35

↵* Defined by PASP ≥ 35 mm Hg or mean PAP > 20 mm Hg at RHC.
↵** Studies that were duplicated because they contain 2 different groups of PAH/PH patients.
↵† Only DLCO versus PASP subanalysis. Total percentage was higher than 100%, since 2 studies included 2 different groups of PAH/PH.