As shown in Table 3, higher MBP levels were related to reduced risks of hospital mortality (OR = 0.955, 95% CI 0.936–0.973, p < 0.001, crude model), 7-day mortality (OR = 0.956, 95% CI 0.938–0.975, p <0.001, crude model), 30-day mortality (OR = 0.951, 95% CI 0.932–0.970, p < 0.001, crude model), and 1-year mortality (OR = 0.953, 95% CI 0.934–0.972, p < 0.001, crude model) in AF patients with MBP ≤ 70 mm Hg. The gene discussed is MBP; the disease is atrial fibrillation.