The AUC of plasma S100A1 for the diagnosis of TIA was 0.720 (Fig. 1B) (P = 0.001, 95% CI [0.592–0.848]), and when cut off was 150.14, its Jmax was 0.442, Se was 50.0%, and Sp was 94.2% (Table 3). The gene discussed is S100A1; the disease is transient ischemic attack.