Fig. 4

The prognostic accuracy of miR-1 (< 3 h) to predict short-term (30 days) MACE-free survival (a); The prognostic accuracy of miR-1 to predict long-term overall survival (720 days) in chest pain patients (b). Kaplan Meier survival curves for all patients with chest pain manifesting with cumulative survival during short-term (30 days) and long-term (720 days) follow-up. Patients were subdivided into low expression of miR-1 and high expression of miR-1 according to optimal cut-off value (2.215) calculated by the Youden index (sensitivity 87.9%, specificity 86.9%). Log-rank values were employed to evaluate statistical significance (P < 0.01)