Accuracy of InBody (770) and RJL (Quantum IV) to DXA body fat percent (%BF) and fat-free mass (FFM)
| Measure | InBody 770 | RJL (Quantum IV) | ||||
| All | Men | Women | All | Men | Women | |
| %BF | ||||||
| Bias | –3.4 | –4.1 | –2.5 | –1.1 | –2.0 | –1.6 |
| MAE | 3.9 | 4.4 | 3.1 | 2.7 | 3.8 | 3.4 |
| SDE | 3.1 | 3.2 | 2.8 | 3.3 | 4.3 | 3.9 |
| LoA upper | 2.7 | 2.2 | 2.9 | 5.3 | 6.4 | 6.1 |
| LoA lower | –9.5 | –10.3 | –7.9 | –7.4 | –10.3 | –9.3 |
| LoA absolute range | 12.2 | 12.4 | 10.9 | 12.8 | 16.7 | 15.4 |
| FFM (kg) | ||||||
| Bias | –2.7 | 3.3 | 1.8 | 0.7 | 1.6 | 1.2 |
| MAE | 3.1 | 3.7 | 2.1 | 1.9 | 3.4 | 2.8 |
| SDE | 2.8 | 3.0 | 2.0 | 2.3 | 4.0 | 3.5 |
| LoA upper | 8.2 | 9.3 | 5.7 | 5.3 | 9.4 | 8.0 |
| LoA lower | –2.6 | –2.6 | –2.2 | –3.9 | –6.3 | –5.6 |
| LoA absolute range | 10.9 | 11.9 | 7.9 | 9.1 | 15.7 | 13.5 |
DXA, dual-energy X-ray absorptiometry; LoA, 95% limits of agreement; MAE, mean absolute error; SDE, SD of error.