title: Descriptive Epidemiology of Acetabular Dysplasia: The Academic Network of Conservational Hip Outcomes Research (ANCHOR) Periacetabular Osteotomy.
abstract: BACKGROUND
  Periacetabular osteotomy (PAO) is an established treatment for symptomatic acetabular dysplasia, which is a well-recognized cause of hip pain, functional limitations, and secondary osteoarthritis. The purpose of this study was to describe the demographics of patients undergoing PAO, the baseline patient-reported outcome measures for this population, and the types of adjunctive procedures performed at the time of PAO surgery.
  
  
  METHODS
  Demographics, disease characteristics, and patient-reported functional measures were prospectively collected from all patients who underwent PAO performed by 12 surgeons from 2008 to 2013.
  
  
  RESULTS
  We enrolled 950 consecutive patients (982 hips) in the study; 83% were female and 17% were male, with an average age of 25.3 years and an average body mass index (BMI) of 24.6 kg/m. Most patients were Caucasian (87%), and 15% had undergone previous hip surgery. Before PAO was performed, most patients had had symptoms for 1 to 3 years. Baseline modified Harris Hip and University of California Los Angeles activity scores (61.8 and 6.6, respectively) indicated that patients had considerable functional limitations.
  
  
  CONCLUSIONS
  Patients undergoing PAO for symptomatic dysplasia were predominantly young, female, and Caucasian with a normal BMI. Many patients had undergone prior hip surgery, and most had had symptoms for several years before treatment. Baseline patient-reported functional scores demonstrated marked functional limitations. Adjunctive procedures for intra-articular pathology, especially femoral osteochondroplasty and hip arthroscopy, are commonly performed at the time of PAO.
authors.affiliation: From the Department of Orthopaedic Surgery, Children's Hospital of Philadelphia, Philadelphia, PA (Dr. Sankar); the Department of Orthopaedic Surgery, University of Kentucky, Lexington, KY (Dr. Duncan), the Department of Orthopaedic Surgery, Washington University School of Medicine, St. Louis, MO (Ms. Baca, Dr. Schoenecker and Dr. Clohisy), the Department of Orthopaedic Surgery, University of Ottawa, Ottawa, Ontario, Canada (Dr. Beaulé), the Department of Orthopaedic Surgery, Boston Children's Hospital, Boston, MA (Dr. Millis and Dr. Kim), the Department of Orthopaedic Surgery, University of Utah, Salt Lake City, UT (Dr. Peters), the Department of Orthopaedic Surgery, Texas Scottish Rite Hospital, Dallas, TX (Dr. Podeszwa and Dr. Sucato), the Department of Orthopaedic Surgery, Mayo Clinic, Rochester, MN (Dr. Sierra and Dr. Trousdale), the Department of Orthopaedic Surgery, Hospital for Special Surgery, New York, NY (Dr. Sink), and the Department of Orthopaedic Surgery, William Beaumont Hospital, Royal Oak, MI (Dr. Zaltz).
authors.forename: Wudbhav N
authors.initials: WN
authors.lastname: Sankar
authors.forename: Stephen T
authors.initials: ST
authors.lastname: Duncan
authors.forename: Geneva R
authors.initials: GR
authors.lastname: Baca
authors.forename: Paul E
authors.initials: PE
authors.lastname: Beaulé
authors.forename: Michael B
authors.initials: MB
authors.lastname: Millis
authors.forename: Young-Jo
authors.initials: YJ
authors.lastname: Kim
authors.forename: Christopher L
authors.initials: CL
authors.lastname: Peters
authors.forename: David A
authors.initials: DA
authors.lastname: Podeszwa
authors.forename: Perry L
authors.initials: PL
authors.lastname: Schoenecker
authors.forename: Rafael J
authors.initials: RJ
authors.lastname: Sierra
authors.forename: Ernest L
authors.initials: EL
authors.lastname: Sink
authors.forename: Daniel J
authors.initials: DJ
authors.lastname: Sucato
authors.forename: Robert T
authors.initials: RT
authors.lastname: Trousdale
authors.forename: Ira
authors.initials: I
authors.lastname: Zaltz
authors.forename: John C
authors.initials: JC
authors.lastname: Clohisy
mesh_terms: D000077:Acetabulum / Q000601:surgery*; D000293:Adolescent; D000328:Adult; D002648:Child; D005260:Female; D006617:Hip Dislocation / Q000175:diagnosis / Q000453:epidemiology / Q000601:surgery*; D006801:Humans; D008137:Longitudinal Studies; D008297:Male; D008875:Middle Aged; D010027:Osteotomy; D063868:Patient Outcome Assessment; D011446:Prospective Studies; D055815:Young Adult