Abstract
Background: Management of proximal femur and acetabular pathologies, such as femoroacetabular impingement, hip osteoarthritis, or hip fractures, requires an understanding of the patient’s anatomy for accurate diagnosis and treatment. Variability in femoral neckshaft angle (FNA) and acetabular version (AV) has been shown, but little insight into differences between ages, ethnicities, and sexes has been evaluated. Methods: Two hundred and fifty cadaveric specimens from the New Mexico Decedent Image Database were evenly divided by sex and among five ethnic groups (Asian American, Black/African American, Hispanic, Native American, White). Using multiplanar reconstruction, thincut computed tomography scans were reviewed by three independent observers. Intra-class correlation coefficient (ICC) was calculated, and analysis of variance and a Tukey multiple comparison test were used to evaluate differences. Results: The average age was 49.4 years (range 19 to 103). Average FNA and AV were 130.1° (115.7° to 144.7°) and 20.2° (8.2° to 36.6°), respectively. FNA ICC was 0.61 (good), and acetabular version ICC was 0.88 (excellent). No significant differences among groups were seen with FNA or AV for ethnicity (P=0.651, P=0.944) or age (P=0.37, P=0.94). There was no significant difference among sex with FNA (P=0.89); however, there was a significant difference with AV (P<0.01) with the Tukey multiple comparison test showing that males had 2.6° less acetabular anteversion than females. Conclusions: The authors found a significant difference in AV for sex only, with males having 2.6° less AV than females, and no difference in FNA seen with sex. When looking at ethnicity and age, no differences in FNA or AV were observed. AV and FNA are similar despite age, sex, or ethnicity.
Recommended Citation
Clinger, Bryce N.; Scott Plaster; River S. Fine; Justin R. Marshall; and Dustin L. Richter. "Differences in CT Scan Measurements of Femoral Neck Shaft Angle and Acetabular Version Among Sex, Age, and Ethnicity from a Large Cadaveric Database." Western Journal of Orthopaedics 12, 1 (2023). https://digitalrepository.unm.edu/wjo/vol12/iss1/11