Comparison of the indexes of renal impairments between two groups of AS patients.

<p>Note: group 2, AS patients with mild and moderate proteinuria; group 3, AS patients with heavy proteinuria; Scr, serum creatinine; BUN, blood urine nitrogen; GFR, glomerular filtration rate.</p><p>Comparison of the indexes of renal impairments between two groups of AS patients.