In Brief:
Key PointsOlder age and delay between clinical onset of lupus nephritis and kidney biopsy were significantly correlated with baseline chronicity index.Chronicity index and its components, but not activity index, were significantly associated with long-term impairment of kidney function.Baseline serum creatinine, arterial hypertension, chronic glomerular lesions, and delay in kidney biopsy predicted kidney function impairment.
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