What Are the Reference Values and Associated Factors for Center-edge Angle and Alpha Angle? A Population-based Study

Clinical Orthopaedics and Related Research
Cornelius Sebastian FischerJörn Lange

Abstract

The available evidence regarding normal ranges for the center-edge angle and the alpha angle derives from a few small studies, and associated factors such as sex and anthropometric factors have not been well evaluated. Knowing more about normal values for these parameters is critical, because this can inform decisions about when to perform elective hip preservation surgery. Population-level studies would provide considerable clarity on these issues, but to our knowledge, no such studies are available. The purposes of this study were (1) to use MRI in patients of a population-based study to establish normal values for the alpha and center-edge angles in the normal adult hip; and (2) to determine whether age, sex, or anthropometric variables were associated with differences in these values. We used MRI images (1.5 T) of 3226 participants of the Study of Health in Pomerania (SHIP). SHIP is a population-based study that started with 4308 participants in 1997. Participants were recruited randomly from official inhabitant data files as a stratified cluster sample of the population from a defined region in northeastern Germany. To ensure a representative epidemiologic cohort, stratification variables were sex, age, and city of residen...Continue Reading

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Citations

Nov 19, 2019·Acta Orthopaedica·Cornelius S FischerJörn Lange
Aug 28, 2020·Orthopaedic Journal of Sports Medicine·Pim van KlijRintje Agricola
Nov 7, 2019·Pediatric Radiology·Sarah D Bixby, Michael B Millis
Feb 21, 2019·The American Journal of Sports Medicine·Michael P McClincyEduardo N Novais
Nov 10, 2020·Journal of Hip Preservation Surgery·Joanna L LangnerGarry E Gold

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