CD79A and hypertensive disorder: IgA antibody production was significantly associated with older age (45–54 years: HR, 2.9; 95% CI, 1.1–7.2; P = .02 and >55 years: HR, 2.9; 95% CI, 1.2–7.3; P = .02) and hypertension (HR, 2.3; (95% CI, 1.2–4.4; P = .01; Figure 5C).