ITGA2 and nasopharyngeal carcinoma: For ITGA2 C807T polymorphism, the adjusted HR for T/T genotype carriers was 2.06 (95% CI = 1.14–3.72) compared to the reference C/C genotype, while NPC cases with distant metastasis showed an adjusted HR of 3.13 (95% CI = 1.44–6.82) compared to those without metastasis, consistent with results from the log-rank test above.