Table 1.
Demographics.
| All (n = 53,560) | Dialysate Ca ≥3.0 mEq/L (n = 32,729) | Dialysate Ca 2.5 mEq/L (n = 20,831) | p | d (%) | ||
|---|---|---|---|---|---|---|
| Age | 65.5 (12.4) | 65.3 (12.5) | 65.7 (12.3) | <0.001 | −3.22 | |
| Male | 32,668 (61.0) | 19,906 (60.8) | 12,762 (61.3) | 0.31 | ||
| Causes of end-stage renal disease | Chronic glomerulo-nephritis | 21,763 (40.6) | 13,430 (41.0) | 8,333 (40.1) | <0.001 | |
| Diabetes mellitus | 17,070 (31.9) | 10,208 (31.2) | 6,862 (32.9) | |||
| Hypertension | 3,958 (7.4) | 2,516 (7.7) | 1,442 (6.9) | |||
| Others | 10,769 (20.1) | 6,575 (20.1) | 4,194 (20.1) | |||
| Dialysis vintage (years) | 9.1 (7.1) | 9.2 (7.2) | 9.0 (7.0) | <0.001 | 2.81 | |
| Ultrafiltration (L) | 2.48 (1.16) | 2.49 (1.17) | 2.47 (1.14) | 0.08 | 1.73 | |
| Phosphate (mg/dL) | 5.28 (1.41) | 5.22 (1.42) | 5.36 (1.39) | <0.001 | −9.94 | |
| Albumin-corrected calcium (mg/dL) | 9.28 (0.78) | 9.31 (0.78) | 9.22 (0.79) | <0.001 | 11.48 | |
| Intact parathyroid hormone (pg/mL) | 145 (71–251) | 134 (64–235) | 164 (84–273) | <0.001 | −20.52* | |
| Body mass index | 21.2 (3.5) | 21.1 (3.5) | 21.2 (3.5) | 0.03 | −2.86 | |
| Albumin (g/dL) | 3.7 (0.4) | 3.7 (0.4) | 3.7 (0.4) | 0.30 | 0 | |
| Hemoglobin (g/dL) | 10.5 (1.2) | 10.5 (1.2) | 10.5 (1.2) | 0.99 | 0 | |
| Total cholesterol (mg/dL) | 153 (36) | 154 (35) | 151 (37) | <0.001 | 8.38 | |
| C reactive protein (mg/dL) | 0.11 (0.05–0.33) | 0.10 (0.05–0.33) | 0.11 (0.05–0.33) | <0.001 | 0* | |
| Kt/V | 1.43 (0.29) | 1.43 (0.29) | 1.42 (0.29) | 0.01 | 3.45 | |
Data shown as n (%), mean (SD), or median (interquartile range) as appropriate. P values were by chi-square test, independent sample t-test or Mann-Whitney-U test. d: standardized difference, *Standardized difference was calculated after log transformation.