Table 2.

Complications accompanied by IgA nephropathy

ComplicationEurope (%)Japan (%)
Gastrointestinal complications0
 Celiac disease20
 Crohn’s disease20.90
 Ulcerative colitis30
 Irritable bowel syndrome40.
 Chronic, nondefined gastrointestinal symptoms60.20
Total171
Others
 Periodontitis0.204
 Atopic dermatitis16
 Bronchial asthma43