Table 1

Demographic and clinical characteristics of UK children with advanced CKD, stratified by KRT status (n=1260)

Variable	CKD (not KRT) cohort 0–<16 years (N=199) n (%)		KRT cohort 0–<16 years (N=832) n (%)
Male sex	128	64.3	518	62.3
Age band (years)
0–5	57	28.6	143	17.2
6–10	60	30.2	276	33.2
11–15	82	41.2	413	49.6
Ethnicity
White	114	57.3	570	68.5
Asian	47	23.6	149	17.9
Black	9	4.5	41	4.9
Other	17	8.5	53	6.4
Missing	12	6.0	19	2.3
Area-level deprivation quintile (using country-adjusted indices of multiple deprivation)
1—least deprived	25	12.6	116	13.9
2	30	15.1	143	17.2
3	34	17.1	155	18.6
4	46	23.1	183	22.0
5—most deprived	61	30.7	226	27.2
Missing	3	1.5	9	1.1
CKD stage or KRT modality
Stage 4	121	60.8
Stage 5	78	39.2
Haemodialysis			87	10.5
Peritoneal dialysis			90	10.8
Kidney transplantation			655	78.7
Primary kidney disease category
Familial/hereditary nephropathies	27	13.6	105	12.6
Glomerular disease	13	6.5	155	18.6
Hypertension/renal vascular disease	2	1.0	0	0.0
Miscellaneous renal disorders	13	6.5	78	9.4
Systemic diseases affecting the kidney	11	5.5	38	4.6
Tubulointerstitial disease	129	64.8	425	51.1
Of which congenital anomalies of the kidney and urinary tract (CAKUT)	129	100.0	415	97.6
Non congenital anomalies	0	0.0	10	2.4
Missing	4	2.2	31	3.7