Accuracy of planar anteversion measurements using anteroposterior radiographs

Table 3 Differences between measured and reference anteversions in pelvis and hip-centered AP radiographs within a safe inclination zone (30 °to 50 ° )

Measurement method		Mean ± SD difference from reference anteversion	Maximum difference from reference anteversion	p-value
Pradhan et al. [13]	Pelvis AP	1.23 ± 0.92	2.90	0.429
Pradhan et al. [13]	Hip-centered AP	−2.66 ± 1.14	−4.83	0.752
Lewinnek et al. [1]	Pelvis AP	2.46 ± 0.98	3.92	0.235
Lewinnek et al. [1]	Hip-centered AP	−2.65 ± 1.12	−4.69	0.367
Widmer et al. [14]	Pelvis AP	−7.61 ± 3.74	−14.46	< 0.001
Widmer et al. [14]	Hip-centered AP	−14.99 ± 4.12	−20.64	< 0.001
Liaw et al. [15]	Pelvis AP	2.13 ± 0.96	3.35	0.523
Liaw et al. [15]	Hip-centered AP	1.76 ± 1.55	4.31	0.847
Hassan et al. [16]	Pelvis AP	−11.65 ± 8.92	−29.35	< 0.001
Hassan et al. [16]	Hip-centered AP	−17.61 ± 8.04	−29.42	< 0.001
Ackland et al. [17]	Pelvis AP	−10.84 ± 6.98	−24.22	< 0.001
Ackland et al. [17]	Hip-centered AP	−13.56 ± 5.30	−28.89	< 0.001

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