| 变量 | r | P |
| 尿酸 | 0.33 | 0 |
| 钙 | 0.233 | 0.003 |
| 矫正钙 | 0.178 | 0.024 |
| 磷 | −0.155 | 0.049 |
| 钙磷乘积 | 0.281 | 0 |
| 白蛋白 | 0.159 | 0.044 |
| 透析龄 | 0.299 | 0 |