AFP and presbycusis: Parametric regression models with Weibull distribution revealed that SBP (hazard ratio [HR], 0.544; 95% CI, 0.382–0.775), blood low-density lipoprotein level (HR, 0.777; 95% CI, 0.630–0.958), protein level (HR, 0.804; 95% CI, 0.708–0.912), albumin (HR, 0.298; 95% CI, 0.245–0.363), calcium level (HR, 0.627; 95% CI, 0.578–0.681), thyroid hormone (T3) level (HR, 0.479; 95% CI, 0.373–0.615), and alpha fetoprotein level (HR, 0.866; 95% CI, 0.787–0.952) were significant protective factors of the development of ARHI.