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. 2021 Sep 1;8(2):36–45. doi: 10.36469/001c.26129

Table 2. US Studies Reporting IgAN Rates in Renal Biopsy.

Study Design and Reference Study period N Diagnosis Rate of IgAN
Retrospective database (Kaiser Permanente, Northern California)33 2018 673 14.3%
Retrospective single-center (University of North Carolina Chapel Hill Division of Nephropathology)43 1986 to 2015 6.6%
Retrospective database (Kaiser Permanente Southern California Health System)31 2000 to 2011 4071 6.3%
Retrospective, single-center (Saint Louis University Hospital)39 1999 to 2006 634 7.7%
Retrospective, single-center (Rural center, Missouri)40 2013 to May 2019 118 8.4%
Meta-analysis of IgAN rates among patients with biopsy 38 887 8.17%
Abbreviations: IgAN, immunoglobulin A nephropathy; US, United States.