Depth, depth difference and GFR value of two kidneys measured by four methods (x ± s)
| Methods | GFR（ml/min） | GFR（ml/min） | GFR（ml/min） | Depth（cm） | Depth（cm） | Depth difference（cm） |
| Total kidney | Left kidney | Right kidney | Left kidney | Right kidney | ||
| Tonnesen formula | 61.84±22.13a | 28.52±12.87a | 33.32±13.82a | 5.97±0.89a | 6.01±0.90a | 0.04±0.01a |
| Lee formula | 78.24±26.86 | 36.24±15.85 | 41.99±16.99 | 7.40±1.18 | 7.40±1.10 | 0.07±0.05b |
| Rotation | 76.62±27.02 | 35.64±15.87 | 40.98±17.25 | 7.26±1.28 | 7.23±1.18 | 0.48±0.36 |
| CT | 77.11±27.52 | 35.93±15.92 | 41.18±16.91 | 7.31±1.26 | 7.28±1.16 | 0.41±0.33 |