NPPB and acute kidney injury: Patients with AKI had significantly longer length of hospitalization (11[9–16] vs 9[9–10]), higher N/L ratio (5.0 [5–6] vs 5.0 [3-5]), BNP (293 [59.0-1355] vs 124 [41–520]), SCr at admission (106 [70-156] vs 90 [74–105]).