NRP1 and nasopharyngeal carcinoma: In this analysis, clinical stage (HR = 6.193, 95% CI: 1.011-13.392, P = 0.006), recurrence (HR = 6.928, 95% CI: 0.922-13.556, P = 0.005), metastasis (HR = 6.893, 95% CI: 1.023-13.528, P = 0.005), and NRP-1 expression (HR = 8.631, 95% CI: 1.392-18.288, P = 0.001) were recognized as independent prognostic factors for NPC patients (Table 3).