Table 2.
Multiple linear regression modeling, dependent variable: C-terminal (total) fibroblast growth factor 23 (n = 78)
| Model | Independent variables | Standardized coefficient | P value | Variance inflation factor | Adjusted R2 |
|---|---|---|---|---|---|
| 1 | EPO | 0.45 | <0.001 | 1.00 | 0.19 |
| 2 | EPO | 0.45 | <0.001 | 1.06 | 0.18 |
| Age | 0.12 | 0.33 | 1.39 | ||
| Sex | –0.12 | 0.32 | 1.27 | ||
| eGFR | 0.07 | 0.57 | 1.50 | ||
| Height-adjusted TKV | 0.12 | 0.32 | 1.23 | ||
| Liver volume | 0.03 | 0.78 | 1.17 | ||
| 3 | EPO | 0.39 | 0.001 | 1.36 | 0.25 |
| Age | 0.08 | 0.53 | 1.59 | ||
| Sex | –0.17 | 0.26 | 2.21 | ||
| eGFR | 0.13 | 0.30 | 1.54 | ||
| Height-adjusted TKV | 0.13 | 0.27 | 1.42 | ||
| Liver volume | 0.00 | 0.97 | 1.25 | ||
| Phosphate | 0.02 | 0.86 | 1.14 | ||
| Calcium | –0.30 | 0.011 | 1.33 | ||
| PTH | –0.05 | 0.63 | 1.25 | ||
| 1,25D | –0.28 | 0.019 | 1.40 | ||
| Hemoglobin | –0.05 | 0.72 | 2.16 |
1,25D, 1,25-dihydroxyvitamin D; eGFR, estimated glomerular filtration rate; EPO, erythropoietin; PTH, parathyroid hormone; TKV, total kidney volume.