Table 2 Stages in the development of Alport syndrome [6]

Stage 0

microscopic hematuria (< 30 mg albumin per g creatinine or per day)

Stage 1

microalbuminuria (30–300 mg albumin per g creatinine or per day)

Stage 2

gross proteinuria (> 300 mg albumin per g creatinine or per day)

Stage 3

impaired renal function (GFR < 60 ml/min/1.73m²)

Stage 4

end-stage renal disease