title: Predicting the location of the hip joint centres, impact of age group and sex.
abstract: Clinical gait analysis incorporating three-dimensional motion analysis plays a key role in planning surgical treatments in people with gait disability. The position of the Hip Joint Centre (HJC) within the pelvis is thus critical to ensure accurate data interpretation. The position of the HJC is determined from regression equations based on anthropometric measurements derived from relatively small datasets. Current equations do not take sex or age into account, even though pelvis shape is known to differ between sex, and gait analysis is performed in populations with wide range of age. Three dimensional images of 157 deceased individuals (37 children, 120 skeletally matured) were collected with computed tomography. The location of the HJC within the pelvis was determined and regression equations to locate the HJC were developed using various anthropometrics predictors. We determined if accuracy improved when age and sex were introduced as variables. Statistical analysis did not support differentiating the equations according to sex. We found that age only modestly improved accuracy. We propose a range of new regression equations, derived from the largest dataset collected for this purpose to date.
authors.affiliation: Department of Physiotherapy, The University of Melbourne, Melbourne, Australia.
authors.forename: Reiko
authors.initials: R
authors.lastname: Hara
authors.affiliation: Department of Physiotherapy, The University of Melbourne, Melbourne, Australia.
authors.forename: Jennifer
authors.initials: J
authors.lastname: McGinley
authors.affiliation: Department of Anatomy and Neuroscience, The University of Melbourne, Melbourne, Australia.|The Victorian Institute of Forensic Medicine, Melbourne, Australia.
authors.forename: Chris
authors.initials: C
authors.lastname: Briggs
authors.affiliation: University of Salford, Manchester, United Kingdom.
authors.forename: Richard
authors.initials: R
authors.lastname: Baker
authors.affiliation: Hugh Williamson Gait Analysis Laboratory, Royal Children's Hospital, Melbourne, Australia.|School of Engineering, The University of Melbourne, Melbourne, Australia.|Murdoch Childrens Research Institute, Melbourne, Australia.
authors.forename: Morgan
authors.initials: M
authors.lastname: Sangeux
mesh_terms: D000293:Adolescent; D000328:Adult; D017677:Age Distribution; D059925:Anatomic Landmarks; D000886:Anthropometry; D002648:Child; D005260:Female; D006621:Hip Joint / Q000502:physiology*; D006801:Humans; D008297:Male; D011642:Publications; D012044:Regression Analysis; D012727:Sex Characteristics; D055815:Young Adult