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All-cause survival according to phosphorus quartiles (Cox analysis). Blue line; Q1: <3.6 mg/dL; red line; Q4 >5.2 mg/dl, and green line, Q2 to Q3 = 3.6 to 5.2 mg/dL. The patients in Q2 to Q3 had the best survival, followed by Q4 and Q1, respectively, taking the value of Q2–Q3 as a reference. Q1: HR 1.94 (95% IC 1.21–3.1, p < 0.006), Q4: HR 1.38 (95% IC 0.770–2.22, p < 0.32).
