Table 1.
Characteristics of patients with biopsy-proven glomerular disease and available data for area-level household income in British Columbia, Canada
| Characteristic | Membranous Nephropathy | IgA Nephropathy | ANCA-Related GN | Lupus Nephritis | FSGS |
|---|---|---|---|---|---|
| N | 392 | 818 | 387 | 389 | 375 |
| Age, yr | 56 (17) | 44 (15) | 61 (18) | 35 (14) | 49 (20) |
| Male sex, n (%) | 223 (57) | 499 (61) | 170 (44) | 66 (17) | 218 (58) |
| Race/ethnicity, n (%) | |||||
| White | 103 (45) | 204 (35) | 140 (54) | 51 (18) | 149 (52) |
| Asian | 57 (25) | 284 (48) | 44 (17) | 169 (59) | 63 (22) |
| South Asian | 53 (23) | 70 (12) | 23 (9) | 37 (13) | 40 (14) |
| Aboriginal | 10 (4) | 18 (3) | 44 (17) | 11 (4) | 11 (4) |
| Other | 5 (3) | 15 (2) | 9 (3) | 18 (6) | 24 (8) |
| Creatinine, mg/dl | 1.0 [0.8–1.4] | 1.4 [1.0–2.1] | 3.0 [1.9–4.6] | 1.0 [0.7–1.5] | 1.5 [1.0–2.5] |
| eGFR, ml/min per 1.73 m2 | 77 [46–97] | 57 [32–79] | 17 [11–30] | 77 [47–106] | 42 [23–76] |
| Mean arterial pressure, mm Hg | 97 (15) | 101 (15) | 95 (15) | 96 (17) | 101 (17) |
| Albumin, g/dl | 2.6 (0.8) | 3.8 (0.6) | 3.2 (0.7) | 2.9 (0.8) | 3.4 (0.9) |
| Proteinuria, g/d | 7.0 [3.0–9.0] | 1.6 [0.8–3.0] | 1.2 [0.6–2.2] | 2.4 [1.2–4.0] | 2.8 [1.4–5.6] |
Numbers expressed as mean (SD) or median [interquartile range] unless otherwise stated. (1) Laboratory data and BP were taken as the closest values within 6 months of the biopsy. (2) Daily protein excretion was measured by 24-hour urine collection or estimated from urine albumin- and protein-to-creatinine ratios (see Supplemental Appendix 2 for details). (3) GFR was estimated from provincially standardized creatinine measurements using the CKD Epidemiology Collaboration formula (44). (4) Race/ethnicity was captured from multiple sources: self-report, country of origin, and patient surname to impute Chinese or South Asian ethnicity (45).