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Raw mortality data by sodium quartiles. All-cause mortality (QI vs. QIV: unadjusted hazard ratio (HR) = 1.25; 95% confidence interval (CI) = 1.05–1.49; P = 0.01); all cardiovascular mortality (QI vs. QIV: HR = 1.61; 95% CI = 1.21–2.13; P = 0.001); limited cardiovascular mortality (QI vs. QIV: HR = 1.49; 95% CI = 1.08–2.05; P = 0.01); noncardiovascular mortality (QI vs. QIV: HR = 1.02; 95% CI = 0.77–1.35; P = 0.87).
