title: Prospective analysis of arthroscopic rotator cuff repair: subgroup analysis.
abstract: BACKGROUND
  The rotator cuff registry was established to evaluate prospectively the effectiveness of arthroscopic rotator cuff repair. The purpose of the present study is to report the preliminary data at the 1- and 2-year time point and perform subgroup analysis to identify factors that may affect outcome.
  
  
  METHODS
  A total of 193 patients underwent all-arthroscopic repair of a rotator cuff tear and met the inclusion criteria and 127 (65.8%) completed 2-year follow-up. The outcome measurements included physical examination, manual muscle testing, the American Shoulder and Elbow Surgeons (ASES) score, and ultrasonography.
  
  
  RESULTS
  The pre-operative ASES score was 52.37 +/- 24.09 and improved to 83.88 +/- 19.28 at 1 year (P < .0001) and 92.65 +/- 11.36 at 2 years (P < 0.0001). The percent healing for all patients was 64.10% at 3 months and 64.34% at 1 year (P = .4080). At 2 years, there was a significant increase in the percentage of healed tendon at 75.42% compared to the 3-month (P (1/4) .0001) and 1-year (P = 0.0332) time points. Patients with intact tendons had an ASES score of 93.9 +/- 10.2 compared to tendon defects with a score of 88.0 +/- 15.6 (P = .0623). Gender, tear size, and acromioclavicular joint involvement have a significant effect on ASES score. Rotator cuff characteristics such as tear size, biceps pathology, acromioclavicular joint pathology, and tissue quality have a significant effect on postoperative tendon integrity.
  
  
  CONCLUSIONS
  Arthroscopic rotator cuff repair demonstrates significant improvement in clinical outcomes and good rate of healing by postoperative ultrasound. Longer-term studies are necessary to determine the efficacy over time.
authors.affiliation: Department of Orthopedic Surgery, Hospital for Special Surgery, Weill Medical College of Cornell University, New York, NY, USA. snho@hotmail.com
authors.forename: Shane J
authors.initials: SJ
authors.lastname: Nho
authors.forename: Michael K
authors.initials: MK
authors.lastname: Shindle
authors.forename: Ronald S
authors.initials: RS
authors.lastname: Adler
authors.forename: Russell F
authors.initials: RF
authors.lastname: Warren
authors.forename: David W
authors.initials: DW
authors.lastname: Altchek
authors.forename: John D
authors.initials: JD
authors.lastname: MacGillivray
mesh_terms: D000368:Aged; D001182:Arthroscopy / Q000379:methods*; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D015601:Injury Severity Score; D008297:Male; D008875:Middle Aged; D010147:Pain Measurement; D010808:Physical Examination / Q000379:methods; D011182:Postoperative Care; D011300:Preoperative Care / Q000379:methods; D011336:Probability; D011446:Prospective Studies; D016059:Range of Motion, Articular / Q000502:physiology*; D020127:Recovery of Function; D012042:Registries; D017006:Rotator Cuff / Q000000981:diagnostic imaging* / Q000601:surgery*; D000070636:Rotator Cuff Injuries; D000070599:Shoulder Injuries; D012785:Shoulder Joint / Q000000981:diagnostic imaging / Q000601:surgery*; D013997:Time Factors; D016896:Treatment Outcome; D018608:Ultrasonography, Doppler; D014481:United States