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Table 4 Intra- and interobserver reliabilities of each parameter

From: The anteroposterior axis of the tibia is adjusted to approximately a right angle to the anterior pelvic plane in the standing position in patients with hip dysplasia similar to normal subjects: a cross-sectional study

  Intraobserver reliability Interobserver reliability
MAD ± SD ICC MAD ± SD ICC
FNA (deg) 1.28 ± 1.45 0.908 1.55 ± 1.82 0.858
CTA (deg) 0.64 ± 0.48 0.936 0.79 ± 0.57 0.918
KRA(deg) 1.47 ± 1.72 0.861 1.87 ± 1.84 0.829
APP-FNA (deg) 1.57 ± 1.86 0.818 1.78 ± 1.93 0.806
APP-CEA (deg) 0.73 ± 0.52 0.937 0.86 ± 0.77 0.914
APP-tibia AP axis (deg) 1.24 ± 0.92 0.868 1.58 ± 1.34 0.857
  1. AP anteroposterior, APP anterior pelvic plane, APP-CEA clinical epicondylar axis relative to the APP, APP-FNA FNA relative to the APP, CTA condylar twist angle, FNA femoral neck anteversion, ICC interclass correlation coefficient, KRA knee rotation angle, MAD mean absolute difference, SD standard deviation