Survival according to risk scores or stage. (A) The cTnT Idealized Risk Score. Risk scores 3 through 5 were merged due to low numbers of patients in higher risk groups. Score 3, n = 6; score 4, n = 0; and score 5, n = 1. See “Patients and methods” for calculation. (B) The cTnI Idealized Risk Score. Risk scores 2 and 3 were merged because there were only 3 patients in the score 3 category. See “Patients and methods” for calculation. (C) cTnT/NT-proBNP Staging System. Stage I-t is when both are below threshold. Stage II-t is when either is greater than or equal to threshold value. Stage III-t is when both are greater than or equal to threshold value. Threshold values for cTnT and NT-proBNP are less than 0.035 μg/L and less than 332 ng/L, respectively. (D) cTnI/NT-proBNP Staging System. Stage I-i is when both are below threshold. Stage II-i is when either is greater than or equal to threshold value. Stage III-i is when both are greater than or equal to threshold value. Threshold values for cTnI and NT-proBNP are less than 0.1 μg/L and less than 332 ng/L, respectively.