title: Effect of age on functional and structural outcome after rotator cuff repair.
abstract: BACKGROUND
  There are numerous reports on the outcome of rotator cuff repair according to age. However, the results are conflicting and driven by univariate analysis, which is not free of confounding factors.
  
  
  OBJECTIVE
  Age does not affect the anatomical and functional outcomes of rotator cuff repair.
  
  
  METHODS
  Case series; Level of evidence, 4.
  
  
  METHODS
  Eighty-one men and 96 women underwent rotator cuff repair at one institution and received computed tomography arthrography and functional evaluations at least 1 year after surgery. Various structural and clinical features according to age were evaluated. The correlation was assessed between age and outcomes, with adjustment for the preoperative score.
  
  
  RESULTS
  Patient mean age was 60.0 +/- 8.7 years. The mean ages were higher in women, nonsmokers, and those with positive paradoxical abduction, lower level of sports activity, the presence of biceps injury, higher fatty degeneration in cuff muscles, inferior isokinetic muscle performance, bigger tear size, more retraction of tear, and symptomatic acromioclavicular arthritis. For the integrity of the repair, the mean age was higher in the retear group (31.1%) than in the intact group (68.9%)-that is, 63.7 +/- 7.5 and 58.4 +/- 8.7 years, respectively (P <.001). Only the Constant score exhibited a positive correlation with age after adjustment (P = .009). Univariate regression analysis revealed that a 0.313-point increment of Constant score could be expected for each year of age.
  
  
  CONCLUSIONS
  On univariate analysis, older age was related with poor postoperative integrity and better functional improvement in Constant score. Multivariate regression revealed that age was not an independent determinant for anatomical or functional outcome whereas the tear retraction and fatty degeneration of the infraspinatus were independent factors for the integrity of repair and the presence of the paradoxical abduction and abduction torque of the unaffected shoulder for the Constant score.
authors.affiliation: Department of Orthopaedic Surgery, Seoul National University Hospital, 28 Yeongeon-dong, Jongno-gu, Seoul 110-744 Korea.
authors.forename: Joo Han
authors.initials: JH
authors.lastname: Oh
authors.forename: Sae Hoon
authors.initials: SH
authors.lastname: Kim
authors.forename: Jong Yeal
authors.initials: JY
authors.lastname: Kang
authors.forename: Chung Hee
authors.initials: CH
authors.lastname: Oh
authors.forename: Hyun Sik
authors.initials: HS
authors.lastname: Gong
mesh_terms: D000367:Age Factors; D000368:Aged; D001182:Arthroscopy / Q000379:methods; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D011183:Postoperative Complications / Q000453:epidemiology* / Q000503:physiopathology; D016059:Range of Motion, Articular; D020127:Recovery of Function; D012189:Retrospective Studies; D017006:Rotator Cuff / Q000601:surgery*; D012785:Shoulder Joint / Q000601:surgery; D013536:Suture Techniques; D013708:Tendon Injuries / Q000601:surgery; D016896:Treatment Outcome