title: Scleral buckling versus primary vitrectomy in rhegmatogenous retinal detachment study (SPR Study): predictive factors for functional outcome. Study report no. 6.
abstract: OBJECTIVE
  To identify risk factors associated with best-corrected visual acuity (BCVA) 1 year after initial surgery following primary vitrectomy (PV) and scleral buckling surgery (SB) for rhegmatogenous retinal detachment (RRD).
  
  
  METHODS
  Relating the final BCVA at the 1-year follow-up visit to pre- and intraoperative findings in the "randomized, prospective, multicenter clinical trial comparing scleral buckling versus primary vitrectomy for repair of rhegmatogenous retinal detachment" (SPR Study) using multivariate statistical methods.
  
  
  RESULTS
  In the phakic subtrial, final BCVA is associated with the number of breaks (p = 0.0259), duration of symptoms (p = 0.0476), baseline BCVA (p = 0.0002), retinal detachment central to major vessels arcades (p = 0.0088), total detachment (p = 0.0027), and chain formation of breaks (p = 0.0129). In the pseudophakic/aphakic subtrial, final BCVA is related to the number of retinal breaks (p = 0.0010), secondary cataract or central capsular fibrosis (p = 0.0141), intraoperative laser photocoagulation (p = 0.0373), and inferior detachment with breaks below the 4 and 8 o'clock positions (p = 0.0173).
  
  
  CONCLUSIONS
  Final BCVA is the most important outcome for patients undergoing RRD surgery. Our results demonstrate that the final BCVA is related to a higher preoperative number of breaks in both subtrials. Additional risk factors varied between phakic and pseudophakic subgroups.
authors.affiliation: Department of Medical Statistics, RWTH Aachen University, Pauwelsstr 30, 52074 Aachen, Germany. nheussen@ukaachen.de
authors.forename: Nicole
authors.initials: N
authors.lastname: Heussen
authors.forename: Nicolas
authors.initials: N
authors.lastname: Feltgen
authors.forename: Peter
authors.initials: P
authors.lastname: Walter
authors.forename: Hans
authors.initials: H
authors.lastname: Hoerauf
authors.forename: Ralf-Dieter
authors.initials: RD
authors.lastname: Hilgers
authors.forename: Heinrich
authors.initials: H
authors.lastname: Heimann
mesh_terms: D006801:Humans; D007430:Intraoperative Care; D017075:Laser Coagulation; D007908:Lens, Crystalline / Q000502:physiology; D011446:Prospective Studies; D019591:Pseudophakia / Q000503:physiopathology; D012163:Retinal Detachment / Q000503:physiopathology / Q000601:surgery*; D012307:Risk Factors; D012591:Scleral Buckling; D016896:Treatment Outcome; D014786:Vision Disorders / Q000503:physiopathology*; D014792:Visual Acuity / Q000502:physiology*; D014821:Vitrectomy