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. Author manuscript; available in PMC: 2010 Oct 13.
Published in final edited form as: Circ Heart Fail. 2010 Mar 3;3(3):405–411. doi: 10.1161/CIRCHEARTFAILURE.109.906446
Weber Class Meeting criteria Major Cardiac Events Percent Event Free
A: >20.0 ml• kg−1•min−1 176 17 90.3%
B: 16.0–19.9 ml• kg g−1•min−1 166 30 81.9%
C: 10.0–15.9 ml• kg−1•min−1 336 118 64.9%
D: <10.0 ml • kg−1•min−1 113 66 41.6%
Log rank: 115.7, p<0.001