Table 1.
Baseline characteristics of study cohort (n=2160) by socioeconomic deprivation quintile
| Variable | Socioeconomic Deprivation Quintile | ||||
|---|---|---|---|---|---|
| 1 (most), n=607 | 2, n=525 | 3, n=382 | 4, n=353 | 5 (least), n=293 | |
| Male gender, n, (%) | 336 (55) | 321 (61) | 230 (60) | 209 (59) | 174 (59) |
| Ethnic group, n (%)a | |||||
| White | 355 (59) | 361 (70) | 316 (83) | 307 (88) | 266 (91) |
| South Asian | 174 (29) | 95 (18) | 32 (8) | 27 (8) | 17 (6) |
| Black | 34 (6) | 27 (5) | 7 (2) | 6 (2) | 2 (0.7) |
| Mixed/other | 41 (7) | 31 (6) | 24 (6) | 10 (3) | 6 (2) |
| Distance from center, km, median (IQR) | 15 (7–41) | 24 (11–54) | 33 (16–68) | 40 (19–68) | 40 (21–67) |
| Urban residence, n (%)b | 572 (98) | 436 (87) | 255 (69) | 252 (72) | 233 (80) |
| Primary kidney disease, n (%)c | |||||
| Glomerular disease | 137 (23) | 116 (22) | 78 (21) | 78 (22) | 52 (18) |
| Systemic diseases affecting the kidney | 17 (3) | 18 (3) | 23 (6) | 15 (4) | 17 (6) |
| Familial/hereditary nephropathies | 113 (19) | 69 (13) | 69 (18) | 47 (13) | 50 (17) |
| Tubulointerstitial disease | 287 (48) | 271 (52) | 177 (47) | 176 (50) | 145 (50) |
| Miscellaneous kidney disorders | 50 (8) | 43 (8) | 32 (8) | 34 (10) | 28 (10) |
| Age at first nephrology review, yr, median (IQR)d | 5 (0.5–11) | 3 (0.2–9) | 5 (0.2–11) | 3 (0.2–9) | 3 (0.2–9) |
| eGFR at first nephrology review, ml/min per 1.73 m2, median (IQR)e | 18 (8–41) | 16 (9–33) | 14 (7–30) | 13 (8–32) | 15 (7–31) |
| Late presentation, n (%)f | 145 (25) | 93 (19) | 103 (29) | 72 (22) | 65 (24) |
| Country, n (%) | |||||
| England | 516 (85) | 427 (81) | 312 (82) | 308 (87) | 273 (93) |
| Scotland | 29 (5) | 46 (9) | 33 (9) | 28 (8) | 18 (6) |
| Wales | 37 (6) | 31 (6) | 23 (6) | 14 (4) | 2 (0.7) |
| Northern Ireland | 25 (4) | 21 (4) | 14 (4) | 3 (0.9) | 0 (0.0) |
| Age at KRT start, yr, median (IQR) | 10 (5–14) | 10 (5–13) | 10 (5–14) | 10 (4–14) | 9 (5–13) |
| Months from first nephrology review to KRT start, median (IQR)f | 26 (3–73) | 35 (7–88) | 24 (2–74) | 30 (5–85) | 27 (4–82) |
| Time period of KRT start, n (%) | |||||
| 1996–2000 | 139 (23) | 101 (19) | 81 (21) | 80 (23) | 56 (19) |
| 2001–2005 | 131 (22) | 119 (23) | 94 (25) | 82 (23) | 70 (24) |
| 2006–2010 | 149 (25) | 135 (26) | 92 (24) | 90 (26) | 81 (28) |
| 2011–2016 | 188 (31) | 170 (32) | 115 (30) | 101 (29) | 86 (29) |
| eGFR at KRT start, ml/min per 1.73 m2, median (IQR)g | 9 (7–12) | 9 (7–12) | 9 (7–12) | 9 (7–12) | 9.1 (7–12) |
| Waitlisted before KRT start, n (%)h | 183 (38) | 182 (43) | 120 (39) | 122 (40) | 103 (41) |
| Start modality, n (%)i | |||||
| Hemodialysis | 194 (37) | 141 (30) | 91 (27) | 80 (26) | 72 (28) |
| Peritoneal dialysis | 220 (41) | 193 (41) | 142 (42) | 118 (38) | 92 (36) |
| Transplant | 117 (22) | 137 (29) | 102 (30) | 110 (36) | 95 (37) |
IQR, interquartile range.
a
Ethnicity missing for n=22.
b
Urban residence data missing for n=63 (Northern Ireland residents).
c
Primary kidney disease data missing for n=18.
d
Age at first nephrology review missing for n=131.
e
eGFR at first nephrology review missing for n=700.
f
Late presentation and time to KRT data missing for n=133.
g
eGFR at KRT start data missing for n=362.
h
Waitlisting data unavailable for n=387.
i
Start modality data missing for n=256.