Open AccessInter-rater and Intrarater Reliabilities of the Identification of a “Gothic Arch” in the Acetabulum of Children With Cerebral Palsy
Author(s) -
Stacey Miller,
Eva Habib,
Jeffrey Bone,
Emily K. Schaeffer,
Brian Yang,
Jodie Shea,
Ava Maleki,
Benjamin J. Shore,
Kishore Mulpuri
Publication year - 2020
Publication title -
journal of pediatric orthopaedics/journal of pediatric orthopedics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.318
H-Index - 96
eISSN - 1539-2570
pISSN - 0271-6798
DOI - 10.1097/bpo.0000000000001615
Subject(s) - medicine , pelvis , arch , acetabulum , cerebral palsy , intra rater reliability , radiography , orthodontics , perimeter , confidence interval , nuclear medicine , surgery , physical therapy , archaeology , mathematics , geometry , history
Progressive hip displacement in children with cerebral palsy (CP) is monitored by measuring migration percentage (MP) on anteroposterior (AP) pelvis radiographs. Accurate measurement of MP requires the lateral margin of the ossified acetabulum to be identified for the placement of Perkin's line. It has been suggested that when there is an erosion of the acetabular rim, described as a gothic arch, the midpoint of the arch be used for the placement of Perkin's line. However, this requires that there be agreement on what constitutes a gothic arch. The purpose of this study was to evaluate the inter-rater and intrarater reliabilities of identifying a gothic arch on pelvis radiographs.