Table 4.
Pathological characteristics of individuals stratified by quartiles of baseline serum transferrin levels
| Characteristics | Serum transferrin (g/L) | ||||
|---|---|---|---|---|---|
| Q1 (n = 26) | Q2 (n = 26) | Q3 (n = 33) | Q4 (n = 26) | P value | |
| ≤1.15 g/L | 1.15-1.38 g/L | 1.38-1.65 g/L | ≥1.65 g/L | ||
| RPS classification†, n (%) | 0.01 | ||||
| I | 0 (0) | 1 (3.8) | 1 (3.1) | 2 (7.4) | |
| IIa | 0 (0) | 1 (3.8) | 5 (15.6) | 3 (11.1) | |
| IIb | 0 (0) | 2 (7.7) | 4 (12.5) | 3 (11.1) | |
| III | 20 (76.9) | 18 (69.2) | 16 (50.0) | 11 (40.7) | |
| IV | 6 (23.1) | 4 (15.4) | 6 (18.8) | 8 (29.6) | |
| IFTA†, n (%) | 0.51 | ||||
| 0 | 0 (0) | 2 (7.7) | 0 (0) | 0 (0) | |
| 1 | 8 (30.8) | 10 (38.5) | 18 (56.3) | 10 (37.0) | |
| 2 | 13 (50.0) | 10 (38.5) | 7 (21.9) | 10 (37.0) | |
| 3 | 5 (19.2) | 4 (15.4) | 7 (21.9) | 7 (25.9) | |
| Interstitial inflammation†, n (%) | 0.48 | ||||
| 0 | 0 (0) | 1 (3.8) | 1 (3.1) | 0 (0) | |
| 1 | 18 (69.2) | 18 (69.2) | 27 (84.4) | 17 (63.0) | |
| 2 | 8 (30.8) | 7 (26.9) | 4 (12.5) | 10 (37.0) | |
| Arteriosclerosis†, n (%) | 0.17 | ||||
| 0 | 1 (3.8) | 3 (11.5) | 3 (9.4) | 2 (7.4) | |
| 1 | 10 (38.5) | 12 (46.2) | 20 (62.5) | 12 (44.4) | |
| 2 | 15 (57.7) | 9 (34.6) | 9 (28.1) | 13 (48.1) | |
| Arteriolar hyalinosis†, n (%) | 0.50 | ||||
| 0 | 0 (0) | 3 (11.5) | 1 (3.1) | 2 (7.4) | |
| 1 | 6 (23.1) | 10 (38.5) | 8 (25.0) | 6 (22.2) | |
| 2 | 20 (76.9) | 13 (50.0) | 23 (71.9) | 19 (70.4) | |
Data are presented as percent for categorical variables. † Defined by RPS Diabetic Nephropathy Classification.
Abbreviations: ESRD, end-stage renal disease; RPS, Renal Pathology Society; IFTA, interstitial fibrosis and tubular atrophy.