FLOT1 and chronic kidney disease: In multivariate analysis, eGFR (HR 0.937, 95% CI 0.904–0.973, P = 0.001), urine PCR (HR 1.357, 95% CI 1.019–1.808, P = 0.037), and urinary mRNA levels of FLOT1 (HR 3.706, 95% CI 1.373–10.005, P = 0.010) were independently associated with CKD progression in patients with IgAN.