Urinary angiotensinogen-to-creatinine ratio and length of stay. (A) Patients were stratified into groups by urinary angiotensinogen-to-creatinine ratio (uAnCR). Patients with uAnCR > the median for the cohort were classified as high (red line), whereas patients with uAnCR ≤ the median were classified as low (black line). Patients who died were censored. The median times to discharge (defined as days after sample collection) were 22 and 7 days for the high and low uAnCR groups, respectively. (B) Receiver operator characteristic (ROC) curve analysis was performed to evaluate the ability of uAnCR to predict the composite outcome discharge > 7 days after sample collection or death ≤ 7 days from sample collection. AUC, area under the curve.