APOA1 and hepatocellular carcinoma: The results showed that the ApoA-I level could serve as a prognostic biomarker especially in NPC (HR = 0.63, 95% CI: 0.54–0.73, p < 0.001), CRC (HR = 0.48, 95% CI: 0.19–0.76, p < 0.001), and HCC (HR = 0.46, 95% CI: 0.27–0.65, p < 0.001).