Table VI.
Bland-Altman bias values with limits of agreement for the reader vs HIPPO agreement analyses, excluding HIPPO measurements generated from a single outlying patient.
| Variable | Reader 1 vs HIPPO (LOA) | Reader 2 vs HIPPO (LOA) | Reader 3 vs HIPPO (LOA) | |||
|---|---|---|---|---|---|---|
| Left hip | Right hip | Left hip | Right hip | Left hip | Right hip | |
| LCEA, ° | -1.1 (-8.0 to 5.8) | 0.0 (-7.5 to 7.5) | 0.1 (-7.6 to 7.8) | -2.0 (-10.5 to 6.6) | -2.1 (-12.1 to 7.9) | -2.0 (-11.8 to 7.8) |
| Tönnis angle, ° | -1.4 (-7.3 to 4.4) | -2.6 (-8.2 to 3.1)* | 1.3 (-4.4 to 7.1) | -0.8 (-6.9 to 5.3) | 0.3 (-5.9 to 6.5) | 0.1 (-5.5 to 5.7) |
| Sharp’s angle, ° | 0.5 (-3.6 to 4.6) | 0.5 (-4.0 to 4.9) | 1.4 (-3.2 to 5.9) | 0.3 (-4.5 to 5.1) | 1.5 (-3.2 to 6.1) | 0.9 (-4.6 to 6.4) |
| CCD angle, ° | 3.6 (-2.4 to 9.6)* | 1.5 (-5.5 to 8.4) | -1.9 (-8.5 to 4.7) | -2.5 (-9.2 to 4.2)* | -0.2 (-11.9 to 11.6) | -0.3 (-11.2 to 10.6) |
| Femoral head coverage, % | -4.8 (-13 to 3.3)* | -5.2 (-12.8 to 2.4)* | -5.8 (-14.4 to 2.8)* | -6.4 (-13.6 to 0.8)* | -7.6 (-17.2 to 2.1)* | -8.2 (-18.5 to 2.1)* |
| Pelvic obliquity | -0.4 (-1.6 to 0.8) | -0.1 (-0.9 to 0.8) | 0.0 (-0.6 to 0.5) | |||
*
Analyses that resulted in wide intraclass correlation coefficient confidence intervals.
CCD, caput-collum-diaphyseal; LCEA, lateral centre-edge angle; LOA, limit of agreement.