Accuracy of InBody (770) and linear correction to DXA body fat percent (%BF) and fat-free mass (FFM)
Measure | InBody 770 | InBody correction %BF=0.8502×InBody%BF+6.951 | ||||
| All | Men | Women | All | Men | Women | |
| %BF | ||||||
| Bias | −3.4 | −4.1 | −2.5 | 0.0 | −0.1 | 0.1 |
| MAE | 3.9 | 4.4 | 3.1 | 2.2 | 2.4 | 2.0 |
| SDE | 3.1 | 3.2 | 2.8 | 2.9 | 3.1 | 2.6 |
| LoA upper | 2.7 | 2.2 | 2.9 | 5.7 | 5.9 | 5.2 |
| LoA lower | −9.5 | −10.3 | −7.9 | −5.7 | −6.0 | −5.0 |
| LoA absolute range | 12.2 | 12.4 | 10.9 | 11.3 | 12.0 | 10.2 |
| FFM (kg) | ||||||
| Bias | −2.7 | 3.3 | 1.8 | −0.1 | −0.1 | 0.0 |
| MAE | 3.1 | 3.7 | 2.1 | 1.9 | 2.2 | 1.4 |
| SDE | 2.8 | 3.0 | 2.0 | 2.6 | 2.9 | 1.9 |
| LoA upper | 8.2 | 9.3 | 5.7 | 5.0 | 5.6 | 3.8 |
| LoA lower | −2.8 | −2.6 | −2.2 | −5.1 | −5.8 | −3.8 |
| LoA absolute range | 10.9 | 11.9 | 7.9 | 10.1 | 11.4 | 7.6 |
DXA, dual-energy X-ray absorptiometry; LoA, 95% limits of agreement; MAE, mean absolute error; SDE, SD of error.