Association of plasma uric acid levels with mortality and renal recovery in the Acute Renal Failure Trial Network (ATN) Study cohort. Unadjusted association between plasma uric acid levels and adverse clinical outcomes. There were no differences in 60-day mortality, 28-day mortality, or alive with renal recovery through day 28 between the groups. Reference is tertile 1 and refers to plasma uric acid level range: 3.3 to 9.4 mg/dL; tertile 2: 9.4 to 12.9 mg/dL; tertile 3: 12.9 to 29.4 mg/dL. For 60-day mortality OR with (95% confidence interval [CI]), tertile 3: 0.93 (0.51-1.71), tertile 2: 0.65 (0.35-1.19); For 28-day mortality OR with (95% CI), tertile 3: 1.03 (0.56-1.89), tertile 2: 0.71 (0.38-1.31); For alive with renal recovery OR with (95% CI), tertile 3: 1.66 (0.72-3.86), tertile 2: 1.47 (0.65-3.32).