Table 2.

Primary cause of chronic kidney disease at referral

Primary kidney disease	Duration
DKD	Date of first diagnosis or if not available, duration prior to entering the CKD Registry
Glomerulonephritis	Date of first diagnosis or if not available, duration prior to entering the CKD Registry
Obstructive uropathy	Date of first diagnosis or if not available, duration prior to entering the CKD Registry
Hypertensive kidney disease	Date of first diagnosis or if not available, duration prior to entering the CKD Registry
ADPKD	Date of first diagnosis or if not available, duration prior to entering the CKD Registry
ANCA vasculitis	Date of first diagnosis or if not available, duration prior to entering the CKD Registry
Lupus nephritis	Date of first diagnosis or if not available, duration prior to entering the CKD Registry
Renovascular disease	Date of first diagnosis or if not available, duration prior to entering the CKD Registry
Reflux nephropathy	Date of first diagnosis or if not available, duration prior to entering the CKD Registry
Other	Date of first diagnosis or if not available, duration prior to entering the CKD Registry
Unknown	Date of first diagnosis or if not available, duration prior to entering the CKD Registry

The primary cause of chronic kidney disease (CKD) will be based on the entry by the treating nephrologist.

ADPKD, autosomal dominant polycystic kidney disease; ANCA, antineutrophil cytoplasmic antibodies; DKD, diabetic kidney disease.