Table 1.
Baseline characteristics
| Na gradient ≤3 mEq/L (n = 45) | Na gradient >3 mEq/L (n = 65) | p value | |
|---|---|---|---|
| Mean age, years | 67 | 69 | 0.44 |
| Male sex, n (%) | 32 (71.1) | 33 (50.8) | 0.05 |
| Primary renal disease, n (%) | |||
| Diabetes | 16 (35.6) | 25 (38.5) | 0.46 |
| Hypertension | 11 (24.4) | 13 (20.0) | |
| Glomerulonephritis | 6 (13.3) | 10 (15.4) | |
| Polycystic kidney disease | 2 (4.4) | 2 (3.1) | |
| Other | 10 (22.2) | 15 (23.1) | |
| Access type, n (%) | |||
| CVC | 22 (48.9) | 35 (53.8) | 0.64 |
| AVF | 20 (44.4) | 28 (43.1) | |
| AVG | 3 (6.7) | 2 (3.1) | |
| Mean dialysis vintage, years | 6.5 | 5.1 | 0.16 |
| Mean dialysis time, h | 3.8 | 3.9 | 0.53 |
| Mean dialysate sodium, mEq/L | 140 | 144 | <0.01 |
| Mean serum sodium, mEq/L | 139 | 137 | <0.01 |
| Serum sodium subgroups, n (%) | |||
| <135 mEq/L | 0 (0) | 15 (23.1) | <0.01 |
| 135–139.9 mEq/L | 34 (75.6) | 44 (67.7) | |
| ≥140 mEq/L | 11 (24.4) | 6 (9.2) |
AVF, arteriovenous fistula; AVG, arteriovenous graft; CVC, central venous catheter. p values in bold are significant.