Table 4.
Univariate Cox proportional models for hospitalization
| Characteristics | Predialysis patients |
Dialysis patients |
||
|---|---|---|---|---|
| HR (95% CI) | P | HR (95% CI) | P | |
| Age (y) | 1.000 (0.98–1.02) | 0.991 | 1.024 (1.01–1.04) | 0.007 |
| Sex (female/male) | 0.761 (0.49–1.18) | 0.222 | 0.592 (0.38–0.92) | 0.021 |
| Diabetes (absent/present) | 3.217 (2.00–5.18) | < 0.001 | 2.374 (1.50–3.75) | < 0.001 |
| Coronary (absent/present) | 13.631 (5.47–34.00) | < 0.001 | 1.358 (0.78–2.35) | 0.275 |
| MDRD-4 (mL/min/1.73 m2) | 0.982 (0.97–0.98) | 0.014 | – | – |
| Albumin (g/dL) | 0.579 (0.27–1.24) | 0.160 | 0.677 (0.37–1.24) | 0.677 |
| Hemoglobin (g/dL) | 0.776 (0.68–0.89) | < 0.001 | 1.036 (0.97–1.11) | 0.316 |
| Calcium (mg/dL) | 0.703 (0.47–1.06) | 0.091 | 1.131 (0.86–1.49) | 0.386 |
| Phosphate (mg/dL) | 1.485 (1.17–1.88) | 0.001 | 0.995 (0.88–1.13) | 0.944 |
| iPTH (pg/dL) | 1.001 (0.99–1.00) | 0.227 | 0.999 (0.99–1.00) | 0.108 |
| CRP (mg/dL) | 1.548 (0.95–2.51) | 0.780 | 0.928 (0.76–1.13) | 0.458 |
| 25(OH)D (ng/mL) | 0.940 (0.91–0.97) | 0.001 | 0.934 (0.89–0.97) | 0.004 |
| 25(OH)D (below/above median) | 0.624 (0.41–0.96) | 0.033 | 0.536 (0.34–0.84) | 0.007 |
25(OH)D, 25-hydroxyvitamin D; CI, confidence interval; CRP, C-reactive protein; HR, hazard ratio; iPTH, intact parathyroid hormone; MDRD-4, estimated glomerular filtration rate estimated by Modification of Diet in Renal Disease formula.