Table 4 Within and between methods mean distance repeatabilities and mean raw and absolute differences for the 3D digitizer (DIG) versus micro-CT resolutions (MED or HIGH) comparison. Each individual was measured twice by each of the three methods and mean ± s.d. distance repeatabilities were calculated for within (considering only replicates of the same individual measured with the same method) and between-methods (considering the same individual measured with different methods). Within and between methods calculations were also done for raw and absolute differences between linear distances (mean ± s.d.). The last line of the table shows the mean between-method percentage error in relation to distance means
Mean distance repeatabilities | |||
|---|---|---|---|
Within | DIG | MED | HIGH |
0.94 ± 0.07 | 0.97 ± 0.02 | 0.98 ± 0.01 | |
Between | MED + HIGH | DIG + MED | DIG + HIGH |
0.95 ± 0.03 | 0.76 ± 0.10 | 0.76 ± 0.12 | |
Mean differences (mm) | |||
Within | DIG | MED | HIGH |
Raw | 0.01 ± 0.04 | −0.002 ± 0.02 | −0.003 ± 0.02 |
Absolute | 0.09 ± 0.03 | 0.07 ± 0.02 | 0.06 ± 0.02 |
Between | MED-HIGH | DIG-MED | DIG-HIGH |
Raw | −0.03 ± 0.14 | −0.02 ± 0.28 | 0.01 ± 0.28 |
Absolute | 0.11 ± 0.05 | 0.27 ± 0.1 | 0.26 ± 0.1 |
% of mean | 2.5 ± 1.0 | 6.5 ± 2.3 | 6.4 ± 3.0 |