Table 1.
Baseline characteristics of patients by CKD category
|
GFR <15 mL/min/1.73 m2 |
GFR 15–29 mL/min/1.73 m2 |
GFR 30–44 mL/min/1.73 m2 |
GFR 45–59 mL/min/1.73 m2 |
|
|---|---|---|---|---|
| (N=581) | (N=514) | (N=838) | (N=962) | |
| Age (yr) |
63.34±16.89* |
71.29±12.77** |
72.61±11.49* |
68.83±12.2 |
| Male (n, %) |
286 (49.2%) |
258 (50.2%) |
479 (57.2%)** |
493 (51.2%) |
| GFR (mL/min/1.73 m2) |
7.64±3.34* |
22.71±4.21* |
38.17±4.3* |
52.9±4.21 |
| BUN (mg/dL) |
49.27±18.25* |
34.98±11.36* |
23.39±6.75* |
17.96±5.12 |
| Serum creatinine (mg/dL) |
7.34±3.27* |
2.49±0.55* |
1.6±0.25* |
1.23±0.19 |
| Hemoglobin (g/dL) |
10.82±1.71* |
11.07±1.57* |
12±1.7* |
12.56±1.63 |
| Serum albumin (g/dL) |
3.99±0.55* |
4.08±0.49* |
4.25±0.39** |
4.33±0.42 |
| Serum calcium (mg/dL) |
9.3±1* |
9.37±0.63* |
9.51±0.64 |
9.56±0.56 |
| Serum phosphorus (mg/dL) |
4.53±1.43* |
3.66±0.56* |
3.46±0.56 |
3.37±0.56 |
| Serum 25-hydroxyvitamin D (ng/mL) |
20.82±9.86* |
24.09±11.65* |
25.86±11.14** |
27.84±14.03 |
| Serum alkaline phosphatase (U/L) |
168.39±329.4* |
91.33±50.15 |
78.11±57.81 |
71.82±32.15 |
| Serum Intact-PTH (pg/mL) (interquartile ranges) | 211.5* (102.2, 411.1) | 83.5* (54.3, 124.4) | 59.9b (42.5, 87.7) | 51.8 (38.4, 77.1) |
Data are mean ± SD and median with interquartile ranges; *P<0.01; **P<0.05 versus GFR 45–59 mL/min/1.73 m2.