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Fractional polynomial plots presenting the quadratic relationship between continuous systolic blood pressure (SBP) with total (A) and treated (B) cardiovascular disease (CVD) mortality and total (E) and treated (F) all-cause mortality among octogenarians (left) and the quadratic relationship between continuous SBP with total (C) and treated (D) CVD mortality and total (G) and treated (H) all-cause mortality among participants <80 years of age (right).
