Cumulative survival of patients with FAB-RA. (Top) Overall survival (OS). (Bottom) Modified survival. (A) In all patients with FAB-RA, Japanese patients had a more favorable prognosis than did German patients in OS (P < .001). Japanese patients had a more favorable prognosis than did German patients in modified survival (P < .001). (B) In patients aged 60 years or younger, Japanese patients had a more favorable prognosis than did German patients in OS (P < .001). Japanese patients had a more favorable prognosis than did German patients in modified survival (P < .001). (C) In patients aged older than 60 years, Japanese patients had a more favorable prognosis than did German patients in OS (P = .025). Japanese patients did not show a more favorable prognosis than did German patients in modified survival (P = .46).