title: Complications and short-term patient outcomes of periacetabular osteotomy for symptomatic mild hip dysplasia.
abstract: BACKGROUND
  The purpose of our study is to identify complications and early functional outcome scores in patients treated with periacetabular osteotomy (PAO) for mild acetabular dysplasia.
  
  
  METHODS
  The study population consisted of patients from a single centre prospective hip registry undergoing PAO with mild acetabular dysplasia (LCEA ≥18° and ≤25°; n = 27 patients; Mild Dysplasia group). A comparison group of patients undergoing PAO with more severe acetabular dysplasia (lateral centre-edge angle [LCEA] ≤17°; n = 50 patients; Severe Dysplasia group) were included as a comparison cohort. Demographics, radiographic findings, complications, and functional outcome scores were recorded at 6 months, 1 year, and 2 years postoperatively (mean 15 months [range 6-30]).
  
  
  RESULTS
  Demographic characteristics were similar in patients with mild dysplasia undergoing PAO compared with more severe dysplasia. Achievement of radiological correction and complication rates were not different between the 2 groups. Functional outcome scores showed similar improvements in modified Harris Hip Score (mHHS), hip outcome score (HOS) activities of daily living (ADL), HOS Sport, and the international Hip Outcome Tool-33 (iHOT-33) at all time points between the 2 groups with over 90% of patients in the mild dysplasia group achieving a minimum important change (MIC) in functional outcome scores at final follow-up.
  
  
  CONCLUSIONS
  Patients with symptomatic mild acetabular dysplasia undergoing PAO have similar complication rates and functional outcomes as a cohort of patients with more severe dysplasia.
authors: Center for Hip Pain and Preservation, Hospital for Special Surgery, New York - USA.
authors: Benjamin F
authors: BF
authors: Ricciardi
authors: Healthcare Research Institute, Hospital for Special Surgery, New York - USA.
authors: Kara G
authors: KG
authors: Fields
authors: Center for Hip Pain and Preservation, Hospital for Special Surgery, New York - USA.
authors: Catherine
authors: C
authors: Wentzel
authors: Center for Hip Pain and Preservation, Hospital for Special Surgery, New York - USA.
authors: Danyal H
authors: DH
authors: Nawabi
authors: Center for Hip Pain and Preservation, Hospital for Special Surgery, New York - USA.
authors: Bryan T
authors: BT
authors: Kelly
authors: Center for Hip Pain and Preservation, Hospital for Special Surgery, New York - USA.
authors: Ernest L
authors: EL
authors: Sink
mesh_terms: D000077:Acetabulum / Q000473:pathology / Q000601:surgery*; D000293:Adolescent; D000328:Adult; D000367:Age Factors; D015331:Cohort Studies; D005260:Female; D005500:Follow-Up Studies; D006617:Hip Dislocation / Q000000981:diagnostic imaging / Q000453:epidemiology / Q000601:surgery*; D006801:Humans; D008297:Male; D010027:Osteotomy / Q000009:adverse effects* / Q000379:methods; D010147:Pain Measurement; D000071066:Patient Reported Outcome Measures; D011183:Postoperative Complications / Q000453:epidemiology / Q000503:physiopathology; D012042:Registries; D018570:Risk Assessment; D012720:Severity of Illness Index; D012737:Sex Factors; D013997:Time Factors; D055815:Young Adult