Model A: Unadjusted. Model A1: Model A + demographics (age and sex) (n=2720). Model A2: Model A1 + pre-hospitalization baseline clinical risk factors (diabetes, blood pressure level, prior cardiovascular disease, eGFR, uPCR, and receipt of ACEi or ARB) (n=2720). Model A3: Model A2 + SES (insurance and education level) (n=2720). Model B: Unadjusted. Model B1: Model B + demographics (age and sex) (n=1195). Model B2: Model B1 + pre- hospitalization baseline clinical risk factors (diabetes, blood pressure level, prior cardiovascular disease, eGFR, uPCR, and receipt of ACEi or ARB) (n=1195). Model B3: Model B2 + APOL1 (n=1195). Model B4: Model B3 + SES (insurance and education level) (n=1195). Model C3: Model B2 + SCT (n=1195). Model C4: Model C3 + SES (insurance and education level) (n=1195). APOL1: apolipoprotein L1; SCT: sickle cell trait; SES: socioeconomic status; ACEi: angiotensin-converting enzyme inhibitors; ARB: Angiotensin-receptor blockers; uPCR: urine protein-creatinine ratio; eGFR: estimated glomerular filtration rate