title: Trends and demographics in hip arthroscopy in the United States.
abstract: OBJECTIVE
  The purpose of this study was to evaluate the trends and report on the demographics of patients undergoing hip arthroscopy in the United States.
  
  
  METHODS
  Patients who underwent hip arthroscopy from 2004 to 2009 were identified by searching Current Procedural Terminology codes in the PearlDiver Patient Records Database (PearlDiver Technologies, Fort Wayne, IN), a national database of orthopaedic insurance records. The year of procedure, age, gender, and region of the United States were recorded for each patient. Results were reported for each variable as the incidence of procedures identified per 10,000 patients searched in the database.
  
  
  RESULTS
  In total, 3,447 cases of hip arthroscopy were identified between 2004 and 2009. The incidence of procedures increased significantly over the study period, from 1.20 cases per 10,000 patients in 2004 to 5.58 in 2009 (P < .001). Hip arthroscopy was performed most commonly in patients aged 20 to 39 years (P < .05), with an incidence of 4.45 cases in each age group. In contrast to other common arthroscopic procedures searched, no gender differences were observed, with a male-to-female ratio of 0.89 (P = .18). The greatest incidence of hip arthroscopy was observed in the Western region with an incidence of 5.24 cases identified compared with 2.94, 2.70, and 2.56 in the Northeast, Midwest, and South, respectively (P < .001).
  
  
  CONCLUSIONS
  A 365% increase in the rate of hip arthroscopy was observed in the examined cohort of patients between 2004 and 2009. The majority of cases were performed in patients aged 20 to 39 years, with no difference in gender. The Western region of the United States was found to have a higher incidence of hip arthroscopy compared with the Midwest, South, and Northeast.
  
  
  METHODS
  Level IV, cross-sectional study.
authors: Department of Orthopaedic Surgery, David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, California 90095, USA.
authors: Scott R
authors: SR
authors: Montgomery
authors: Stephanie S
authors: SS
authors: Ngo
authors: Taylor
authors: T
authors: Hobson
authors: Shawn
authors: S
authors: Nguyen
authors: Ram
authors: R
authors: Alluri
authors: Jeffrey C
authors: JC
authors: Wang
authors: Sharon L
authors: SL
authors: Hame
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D001182:Arthroscopy / Q000639:trends*; D002648:Child; D005260:Female; D006621:Hip Joint / Q000601:surgery*; D006801:Humans; D007592:Joint Diseases / Q000601:surgery*; D008297:Male; D008875:Middle Aged; D014481:United States / Q000453:epidemiology; D055815:Young Adult