Study and population characteristics
| Any CKD stage, n= 28 489 (4.4% of 644 080)24 | CKD stage 3a (eGFR 45–59), n= 19 977 | CKD stage 3b (eGFR 30–44), n= 6383 | CKD stage 4 (eGFR 15–29), n= 1693 | CKD stage 5 (eGFR <15), n= 436 | |
|---|---|---|---|---|---|
| Age, years, mean (SD)a | 74.8 (12.3) | 73.1 (12.2) | 79.4 (10.9) | 78.2 (13.0) | 72.3 (14.4) |
| 18–24 | 21 (0.1) | 14 (0.1) | 5 (0.1) | 2 (0.1) | 0 (0.0) |
| 25–34 | 152 (0.5) | 115 (0.6) | 18 (0.3) | 10 (0.6) | 9 (2.1) |
| 35–44 | 369 (1.3) | 284 (1.4) | 38 (0.6) | 33 (1.9) | 14 (3.2) |
| 45–54 | 1367 (4.8) | 1157 (5.8) | 125 (2.0) | 51 (3.0) | 34 (7.8) |
| 55–64 | 3285 (11.5) | 2755 (13.8) | 348 (5.5) | 126 (7.4) | 56 (12.8) |
| 65–74 | 7509 (26.4) | 5859 (29.3) | 1240 (19.4) | 308 (18.2) | 102 (23.4) |
| 75–84 | 9478 (33.3) | 6386 (32.0) | 2399 (37.6) | 558 (33.0) | 135 (31.0) |
| ≥85 | 6308 (22.1) | 3407 (17.1) | 2210 (34.6) | 605 (35.7) | 86 (19.7) |
| Sex | |||||
| Female | 17 768 (62.4) | 12 487 (62.5) | 4085 (64.0) | 985 (58.2) | 211 (48.4) |
| Socioeconomic status by SIMD quintileb | |||||
| 1 (least deprived) | 4981 (17.5) | 3456 (17.3) | 1125 (17.6) | 313 (18.5) | 87 (20.0) |
| 2 | 6288 (22.1) | 4312 (21.6) | 1442 (22.6) | 418 (24.7) | 116 (26.6) |
| 3 | 6025 (21.1) | 4197 (21.0) | 1398 (21.9) | 341 (20.1) | 89 (20.4) |
| 4 | 5453 (19.1) | 3806 (19.1) | 1215 (19.0) | 348 (20.6) | 84 (19.3) |
| 5 (most deprived) | 4995 (17.5) | 3659 (18.3) | 1047 (16.4) | 237 (14.0) | 52 (11.9) |