Table 1.
Baseline characteristics of the participants
| Characteristics | Total n = 178,114 | 1 SNa≤136 n = 34,588 | 2 136<SNa≤138 n = 39,968 |
3 138<SNa≤140 n = 49,076 |
4 140<SNa≤141 n = 20,537 |
5 141<SNa n = 33,945 |
P |
|---|---|---|---|---|---|---|---|
| Male/female | |||||||
| Age (years) | 65.2 ± 12.5 | 66.51 ± 12.76 | 65.04 ± 12.66 | 64.78 ± 12.42 | 64.93 ± 12.24 | 65.04 ± 12.03 | <0.001 |
| HD vintage (years) | 7.2 ± 7.2 | 6.42 ± 6.43 | 7.04 ± 6.90 | 7.30 ± 7.23 | 7.60 ± 7.45 | 7.99 ± 7.79 | <0.001 |
| HD time (min) | 235.7 ± 31.6 | 234.89 ± 32.85 | 236.57 ± 31.88 | 236.06 ± 30.48 | 235.72 ± 31.04 | 235.23 ± 30.52 | 0.299 |
| Pre-HD Hb (g/dl) | 10.4 ± 1.3 | 10.39 ± 1.37 | 10.45 ± 1.28 | 10.40 ± 1.24 | 10.37 ± 1.22 | 10.30 ± 1.23 | <0.001 |
| Pre-HD Alb (g/dl) | 3.7 ± 0.4 | 3.59 ± 0.48 | 3.69 ± 0.43 | 3.72 ± 0.41 | 3.73 ± 0.41 | 3.72 ± 0.42 | <0.001 |
| Pre-HD Ca (mg/dl) | 9.0 ± 0.8 | 8.91 ± 0.86 | 8.98 ± 0.83 | 8.97 ± 0.82 | 8.98 ± 0.81 | 8.96 ± 0.81 | <0.001 |
| Pre-HD P (mg/dl) | 5.3 ± 1.4 | 5.22 ± 1.57 | 5.33 ± 1.47 | 5.32 ± 1.41 | 5.29 ± 1.38 | 5.25 ± 1.38 | 0.0082 |
| Pre-HD T-Chol (mg/dl) | 153.2 ± 37.0 | 150.86 ± 37.69 | 152.91 ± 37.14 | 153.80 ± 36.74 | 154.57 ± 36.70 | 154.41 ± 36.15 | <0.001 |
| Pre-HD CRP (mg/dl) | 0.5 ± 1.6 | 0.84 ± 2.20 | 0.56 ± 1.64 | 0.47 ± 1.30 | 0.43 ± 1.35 | 0.40 ± 1.18 | <0.001 |
| Kt/V (single pool) | 1.4 ± 0.3 | 1.38 ± 0.31 | 1.39 ± 0.30 | 1.39 ± 0.30 | 1.39 ± 0.31 | 1.39 ± 0.30 | <0.001 |
| nPCR | 0.87 ± 0.18 | 0.88 ± 0.19 | 0.88 ± 0.18 | 0.88 ± 0.18 | 0.87 ± 0.18 | 0.86 ± 0.18 | <0.001 |
| ΔBW% | 4.18 ± 11.07 | 4.41 ± 13.29 | 4.36 ± 6.18 | 4.18 ± 8.90 | 3.94 ± 15.56 | 3.86 ± 12.51 | <0.001 |
| Past history | |||||||
| MI (%) | 5230 (2.9) | 1012 (2.9) | 1262 (2.5) | 1406 (2.9) | 592 (2.9) | 958 (2.8) | <0.001 |
| BI (%) | 21898 (12.3) | 5440 (15.7) | 4911 (9.8) | 5579 (11.4) | 2269 (11.0) | 3699 (10.9) | <0.001 |
| BH (%) | 7840 (4.4) | 1730 (5.0) | 1520 (4.4) | 1823 (3.6) | 699 (3.4) | 1222 (3.6) | <0.001 |
| Amputation (%) | 4297 (2.4) | 1312 (3.8) | 971 (1.9) | 1042 (2.1) | 386 (1.9) | 586 (1.7) | <0.001 |
| Hip fracture (%) | 3844 (2.6) | 1105 (3.2) | 827 (1.7) | 929 (1.9) | 391 (1.9) | 592 (1.7) | <0.001 |
Alb, serum albumin; BH, brain hemorrhage; BI, brain infarction; BW, body weigh; Ca, calcium; CRP, C-reactive protein; CVD, cardiovascular disease; Hb, hemoglobin; HD, hemodialysis; MI, myocardial infarction; nPCR, normal protein catabolic rate; P, phosphate; SNa, serum sodium; T.Chol. total cholesterol.
Values are presented as means ± SDs.