Table 1

Comparisons of Various Characteristics as a Function of the Study Site

CharacteristicMaastricht (n = 365)Boston (n = 209)Barcelona (n = 80)Christchurch (n = 66)
NT-proBNP, pg/ml (median, interquartile range)6,842 (2,888–12,626)4,054 (1,674–10,027)3,538 (2,115–10,017)854 (441–1,951)
Serum creatinine, mg/dl (mean ± SD)1.4 ± 0.81.3 ± 0.51.1 ± 0.71.0 ± 0.2
Glomerular filtration rate (mg/min/1.73m2), mean ± SD55 ± 2458 ± 2577 ± 3178 ± 22
Serum creatinine patterns following admission
 Rise ≥0.3 mg/dl45%37%N/A21%
 Fall ≥0.3 mg/dl7.1%4.8%N/A18.2%
60-day mortality15.6%8.1%6.3%15.2%

N/A = not available; NT-proBNP = amino-terminal pro-brain natriuretic peptide.