title: Predictive factors for postoperative visual function of primary chronic rhegmatogenous retinal detachment after scleral buckling.
abstract: OBJECTIVE
  To evaluate predictive factors for postoperative visual function of primary chronic rhegmatgenous retinal detachment (RRD) after sclera buckling (SB).
  
  
  METHODS
  Totally 48 patients (51 eyes) with primary chronic RRD were included in this prospective interventional clinical cases study, which underwent SB alone from June 2008 to December 2014. Age, sex, symptoms duration, detached extension, retinal hole position, size, type, fovea on/off, proliferative vitreoretinopathy (PVR), posterior vitreous detachment (PVD), baseline best corrected visual acuity (BCVA), operative duration, follow up duration, final BCVA were measured. Pearson correlation analysis, Spearman correlation analysis and multivariate linear stepwise regression were used to confirm predictive factors for better final visual acuity. Student's t-test, Wilcoxon two-sample test, Chi-square test and logistic stepwise regression were used to confirm predictive factors for better vision improvement.
  
  
  RESULTS
  Baseline BCVA was 0.8313±0.6911 logMAR and final BCVA was 0.4761±0.4956 logMAR. Primary surgical success rate was 92.16% (47/51). Correlation analyses revealed shorter symptoms duration (r=0.3850, P=0.0053), less detached area (r=0.5489, P<0.0001), fovea (r=0.4605, P=0.0007), no PVR (r=0.3138, P=0.0250), better baseline BCVA (r=0.7291, P<0.0001), shorter operative duration (r=0.3233, P=0.0207) and longer follow up (r=-0.3358, P=0.0160) were related with better final BCVA, while independent predictive factors were better baseline BCVA [partial R-square (PR(2))=0.5316, P<0.0001], shorter symptoms duration (PR(2)=0.0609, P=0.0101), longer follow up duration (PR(2)=0.0278, P=0.0477) and shorter operative duration (PR(2)=0.0338, P=0.0350). Patients with vision improvement took up 49.02% (25/51). Univariate and multivariate analyses both revealed predictive factors for better vision improvement were better baseline vision [odds ratio (OR) =50.369, P=0.0041] and longer follow up duration (OR=1.144, P=0.0067).
  
  
  CONCLUSIONS
  Independent predictive factors for better visual outcome of primary chronic RRD after SB are better baseline BCVA, shorter symptoms duration, shorter operative duration and longer follow up duration, while independent predictive factors for better vision improvement after operation are better baseline vision and longer follow up duration.
authors: Department of Ophthalmology, SIR RUN RUN SHAW Hospital, SIR RUN RUN SHAW Institute of Clinical Medicine of Zhejiang University, Hangzhou 310016, Zhejiang Province, China.
authors: Wei
authors: W
authors: Fang
authors: Department of Ophthalmology, SIR RUN RUN SHAW Hospital, SIR RUN RUN SHAW Institute of Clinical Medicine of Zhejiang University, Hangzhou 310016, Zhejiang Province, China.
authors: Jiu-Ke
authors: JK
authors: Li
authors: Department of Ophthalmology, SIR RUN RUN SHAW Hospital, SIR RUN RUN SHAW Institute of Clinical Medicine of Zhejiang University, Hangzhou 310016, Zhejiang Province, China.
authors: Xiao-Hong
authors: XH
authors: Jin
authors: Department of Ophthalmology, SIR RUN RUN SHAW Hospital, SIR RUN RUN SHAW Institute of Clinical Medicine of Zhejiang University, Hangzhou 310016, Zhejiang Province, China.
authors: Yuan-Min
authors: YM
authors: Dai
authors: Department of Ophthalmology, SIR RUN RUN SHAW Hospital, SIR RUN RUN SHAW Institute of Clinical Medicine of Zhejiang University, Hangzhou 310016, Zhejiang Province, China.
authors: Yu-Min
authors: YM
authors: Li
keywords: chronic retinal detachment; predictive factors; scleral buckling