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Table 3 Correlation analysis of the mean absolute differences was performed by a paired t test for the comparison of the different positioning techniques among each other: (a) positioning I versus II, (b) positioning I versus III, (c) positioning II versus III

From: “Simple mechanical devices did not improve pelvis positioning in AP pelvis radiographs for reliable assessment of the acetabular orientation”

Measurement value Correlation (a) Significance (a) Correlation (b) Significance (b) Correlation (c) Significance (c)
(1) 0.69 0.02 0.77 0.01 0.55 0.08
(2) 0.32 0.33 0.07 0.84 0.41 0.21
(3) 0.35 0.39 0.12 0.76 0.17 0.66
(4) 0.04 0.91 0.31 0.38 0.39 0.26
(5) 0.02 0.96 0.21 0.56 0.42 0.22
(6) 0.54 0.08 0.13 0.71 0.38 0.24
(7) 0.62 0.06 0.62 0.06 0.77 0.01