Table 5.

Severity score system

Clinical characteristics	Points
Past disease activity score
Has the subject ever received dialysis?	No = 0, Yes = 1
Has the subject ever received a kidney transplant?	No = 0, Yes = 1
Did the subject receive dialysis or transplant at age ≤ 5 years?	No = 0, Yes = 1
Current estimated glomerular filtration rate (eGFR, ml/min/1.73m2) score
eGFR > 60	0
30 < eGFR ≤ 60	1
15 < eGFR ≤ 30	2
eGFR ≤ 15	3
Severity Score (past disease activity score + current eGFR score)	0 to 6

eGFR, estimated glomerular filtration rate (using the bedside CKiD equation [12] for subjects aged <18 years or the MDRD equation [13] for those ≥ 18 years).