IBSP and laryngeal carcinoma: Among them, RCN1 (hazard ratio (HR): 1.928852, 95% confidence interval (CI): 1.194018-3.115926, p-value = 0.007261) and IBSP (HR: 1.928852, 95% CI: 1.194018-3.115926, p-value = 0.007261) were risk factors for laryngeal cancer.