From: Association of cardiac and renal function with extreme N-terminal fragment Pro-B-type natriuretic peptide levels in elderly patients
NT pro-BNP 3000–10000 (pg/mL, %) ( group A, n = 108)
NT pro-BNP ≥10000 (pg/mL, %) ( group B, n = 44)
P
NYHAI
23 (21)
7 (16)
NS
NYHAII
36 (34)
13 (30)
NYHAIII
31 (38)
15 (34)
NYHAIV
18 (17)
9 (20)