title: Predictors of radio-cephalic arteriovenous fistulae patency in an Asian population.
abstract: To identify predictors of arteriovenous fistula (AVF) patency in Asian patients with autogenous radio-cephalic arteriovenous fistula (RCAVF).
  
  
  
  Retrospective review of 436 RCAVFs created between 2009 and 2013. Predictors of patency were identified with univariate and multivariate analysis. Kaplan-Meier survival analysis and log-rank test were used to calculate patency rates.
  
  
  
  Overall secondary patency rate was 72% at 12 months, 69% at 24 months, 58% at 36 months, 57% at 48 months, 56% at 60 months and 54% at 72 months. Univariate analysis showed that factors which predict for patency include male gender (p = 0.003), good diabetic control (p = 0.025), aspirin use (p = 0.031), pre-dialysis status (p = 0.037), radial artery diameter (p = 0.029) and non-calcified radial arteries (p = 0.002). Age (p = 0.866), cephalic vein diameter (p = 0.630) and surgeon grade (p = 0.472) did not predict for primary AVF failure. Multivariate analysis revealed the male gender to be an independent predictor for patency (odds ratio 1.99, p = 0.01). Subset analysis showed a significantly larger average radial artery diameter of 2.3 mm amongst males, as compared to 1.9 mm amongst females (p = 0.001) and no statistical difference in the average cephalic vein diameter.
  
  
  
  Within our Asian study population, 12-month patency rate of RCAVF is 72%, 69% at 24 months, 58% at 36 months, 57% at 48 months, 56% at 60 months and 54% at 72 months. Male gender is an independent predictor for RCAVF patency. In females or patients with calcified radial arteries, a more proximal AVF should be considered.
authors: Vascular Surgery Service, Department of General Surgery, Tan Tock Seng Hospital, Singapore - Singapore.
authors: Zhiwen
authors: Z
authors: Joseph Lo
authors: Vascular Surgery Service, Department of General Surgery, Tan Tock Seng Hospital, Singapore - Singapore.
authors: Wee Ming
authors: WM
authors: Tay
authors: Vascular Surgery Service, Department of General Surgery, Tan Tock Seng Hospital, Singapore - Singapore.
authors: Qinyi
authors: Q
authors: Lee
authors: Vascular Surgery Service, Department of General Surgery, Tan Tock Seng Hospital, Singapore - Singapore.
authors: Jia Long
authors: JL
authors: Chua
authors: Vascular Surgery Service, Department of General Surgery, Tan Tock Seng Hospital, Singapore - Singapore.
authors: Glenn Wei Leong
authors: GW
authors: Tan
authors: Vascular Surgery Service, Department of General Surgery, Tan Tock Seng Hospital, Singapore - Singapore.
authors: Sadhana
authors: S
authors: Chandrasekar
authors: Vascular Surgery Service, Department of General Surgery, Tan Tock Seng Hospital, Singapore - Singapore.
authors: Sriram
authors: S
authors: Narayanan
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D001166:Arteriovenous Shunt, Surgical / Q000009:adverse effects; D044466:Asian People; D016009:Chi-Square Distribution; D005260:Female; D006083:Graft Occlusion, Vascular / Q000175:diagnosis / Q000208:ethnology / Q000503:physiopathology; D006801:Humans; D053208:Kaplan-Meier Estimate; D016015:Logistic Models; D008297:Male; D008875:Middle Aged; D015999:Multivariate Analysis; D016017:Odds Ratio; D017534:Radial Artery / Q000000981:diagnostic imaging / Q000503:physiopathology / Q000601:surgery*; D006435:Renal Dialysis; D012189:Retrospective Studies; D012307:Risk Factors; D012737:Sex Factors; D012846:Singapore / Q000453:epidemiology; D013997:Time Factors; D016896:Treatment Outcome; D034941:Upper Extremity / Q000098:blood supply*; D061205:Vascular Calcification / Q000208:ethnology; D014654:Vascular Patency; D014680:Veins / Q000000981:diagnostic imaging / Q000503:physiopathology / Q000601:surgery*; D055815:Young Adult