Table 2.

Classification of HSP nephritis severity based on expert opinion from the SHARE initiative

SEVERITY	DEFINITION
Mild nephritis	GFR > 80 mL/min/1.73 m2 and early morning UP:UC ratio of < 250 mg/mmol
Moderate nephritis	< 50% crescents on renal biopsy findings and GFR of < 80 mL/min/1.73 m2 or early morning UP:UC ratio of > 250 mg/mmol for at least 4 wk
Severe nephritis	> 50% crescents on renal biopsy findings and GFR of < 80 mL/min/1.73 m2 or early morning UP:UC ratio of > 250 mg/mmol for at least 4 wk

GFR—glomerular filtration rate, HSP—Henoch-Schönlein purpura, SHARE—Single Hub and Access Point for Paediatric Rheumatology in Europe, UC—urine creatinine, UP—urine protein.

Data from Ozen et al.²