Serum Nrf2 levels of patients were intimately correlated with NIHSS scores (P < 0.001; Figure 3A), hematoma volume (P < 0.001; Figure 3B), and other variables, including admission time, blood collection time, intraventricular hemorrhage, Graeb scores, subarachnoid hemorrhage, blood glucose levels, and blood leukocyte count (all P < 0.05; Table 2). This evidence concerns the gene NFE2L2 and hematoma.