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Systematic and random error by BMI cohort
| All | BMI ⩽ 25 | BMI > 25 | p | |
|---|---|---|---|---|
|
| ||||
| Σx (mm) | 3.2 | 2.5 | 3.6 | <0.001a,* |
| Σy (mm) | 4.1 | 3.4 | 4.4 | <0.01a,* |
| Σz (mm) | 4.0 | 2.5 | 5.6 | <0.001a,* |
| Σ3D (mm) | 5.9 | 4.2 | 6.8 | <0.001a,* |
| σx (mm) | 4.5 | 3.9 | 4.6 | 0.48b |
| σy (mm) | 4.6 | 4.6 | 4.7 | 0.92b |
| σz (mm) | 5.5 | 5.0 | 5.9 | 0.84b |
| σ3D (mm) | 6.8 | 6.2 | 6.7 | 0.51b |
Abbreviations: Σ = systematic error; σ = random error; x = x-axis; y = y-axis; z = z-axis; 3D = 3-dimensional.
Bartlett’s F-test p-value.
Non-equivalent variance t-test p-value.
