Association between number of adverse features and FFS in patients treated with ABVD or equivalent regimens.

(A) FFS, all Ann Arbor stages. (B) FFS, Ann Arbor stage III or IV. ○ indicates no adverse features; □, 1 adverse feature; ▵, 2 adverse features; ⋄, 3 adverse features; +, 4 adverse features; and no symbol, 5 adverse features.