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Persistent hematuria but not persistent proteinuria predicts a higher risk of renal relapse. Cumulative incidence curves for renal relapse in patients with and without (A) persistent hematuria for 6 months, and (B) persistent proteinuria for 6 months. Adjusted for study: ANCA type (antiproteinase 3 versus antimyeloperoxidase), pulmonary involvement, and baseline creatinine. Relapse without renal involvement and development of ESRD were competing events.
