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Table 5 Classifications of vascular involvement

From: The clinical features of pulmonary artery involvement in Takayasu arteritis and its relationship with ischemic heart diseases and infection

  Total (n = 166) PAI (n = 24) Without PAI (n = 142)
I 37 (26.4%) 3 (14.3%) 34 (28.6%)
IIa 25 (17.9%) 7 (33.3%) 18 (15.1%)
IIb 14 (10.0%) 5 (23.8%) 9 (7.6%)
III 7 (5.0%) 1 (4.8%) 6 (5.0%)
IV 6 (4.3%) 0 (0.0%) 6 (5.0%)
V 51 (36.4%) 5 (23.8%) 46 (38.7%)
  1. Data are expressed as numbers (percentage). PAI pulmonary artery involvement