title: Patient-centered outcomes after hip arthroscopy for femoroacetabular impingement and labral tears are not different in patients with normal, high, or low femoral version.
abstract: OBJECTIVE
  The purpose of this study was to determine whether outcomes after hip arthroscopy were different based on femoral version.
  
  
  METHODS
  The inclusion criteria were diagnosis of femoroacetabular impingement (FAI) based on clinical examination and/or imaging findings and preoperative measurement of femoral version by magnetic resonance imaging. For this study, the definition of FAI was a positive impingement sign, a positive flexion-abduction-external rotation examination finding, or radiographic signs of impingement. A query of a prospective data registry identified 180 patients who matched the inclusion and exclusion criteria. Group 1 had version of less than 5° (n = 48), group 2 had version of 5° to 15° (n = 84), and group 3 had version greater than 15° (n = 48). The mean age of the patients was 35 years (range, 18 to 61 years).
  
  
  RESULTS
  On radiographic examination, the mean alpha angle for all patients' injured hips was 63° (range, 42° to 88°). The mean center-edge angle was 30° (range, 20° to 43°), and mean femoral version was 9.9° (range, -16° to 29°). There was no significant difference in age, alpha angle, or center-edge angle among the 3 version groups. A significant difference in psoas release procedures (psoas impingement) was seen with increasing femoral version. The mean follow-up period was 30 months (range, 18 to 47 months). Patient-reported functional outcomes were not statistically different among the groups.
  
  
  CONCLUSIONS
  Patient-reported functional outcomes after hip arthroscopy for labral tears and FAI were not different based on femoral version in this population. Although some differences were observed regarding intraoperative findings, these also did not result in differences in patient outcomes reported at a mean follow-up of 2 years.
  
  
  METHODS
  Level IV, therapeutic case series.
authors.affiliation: Steadman Philippon Research Institute, Vail, Colorado, U.S.A.
authors.forename: Fernando P
authors.initials: FP
authors.lastname: Ferro
authors.affiliation: Steadman Philippon Research Institute, Vail, Colorado, U.S.A.
authors.forename: Charles P
authors.initials: CP
authors.lastname: Ho
authors.affiliation: Steadman Philippon Research Institute, Vail, Colorado, U.S.A.
authors.forename: Karen K
authors.initials: KK
authors.lastname: Briggs
authors.affiliation: Steadman Philippon Research Institute, Vail, Colorado, U.S.A.. Electronic address: drphilippon@sprivail.org.
authors.forename: Marc J
authors.initials: MJ
authors.lastname: Philippon
mesh_terms: D000328:Adult; D000368:Aged; D001182:Arthroscopy; D017760:Bone Malalignment / Q000601:surgery; D005260:Female; D057925:Femoracetabular Impingement / Q000601:surgery*; D051445:Fibrocartilage / Q000293:injuries / Q000601:surgery*; D025981:Hip Injuries / Q000601:surgery*; D006621:Hip Joint / Q000601:surgery*; D006801:Humans; D008297:Male; D008875:Middle Aged; D063868:Patient Outcome Assessment; D016059:Range of Motion, Articular; D012042:Registries; D012189:Retrospective Studies