APOE and nasopharyngeal carcinoma: As shown in Table 1, for the 352 nasopharyngeal carcinoma patients, with overall survival status as the endpoint and based on the cut-off point determined by the ROC curve, the ApoE level was dichotomized, and the patients were divided into two groups: high ApoE level group (ApoE > 71.5 mg/L) and low ApoE level group (ApoE ≤ 71.5 mg/L).