CD163 and glomerulonephritis: LN-A patients with an elevated spot proteinuria/creatinuria ratio (p = 8 × 10−6) and sCD163/creatinuria ratio (p = 10−3) were at risk for developing end-stage kidney disease but sCD163/creatinuria ratio cannot substitute kidney biopsy to discriminate LN-A from other glomerulonephritis.