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Table 4 Univariate analysis of haemodialysis-units variables and HBV infection

From: Hepatitis B virus infection in Haemodialysis Centres from Santa Catarina State, Southern Brazil. Predictive risk factors for infection and molecular epidemiology

  HBV carriers HBV non-carriers P
Type of haemodialysis equipment    
   proportional system 8 (4.9%) 153 (95.1%) 0.0071
   central system 66 (12.3%) 469 (87.7%)  
   double tank 7 (5.9%) 110 (94.1%)  
Hygiene frequency    
   Between shifts 11 (4.1%) 256 (95.9%) 0.0002
   End of the day 70 (12.8%) 476 (87.2%)  
Sterilization frequency    
   daily 8 (5.2%) 146 (94.8%) 0.0043
   weekly 30 (8.4%) 326 (91.6%)  
   never 43 (14.2%) 260 (85.8%)  
Dialysis Unit Rooms    
B 26 (86.7%) 4 (13.3%) <0.0001
   B/C 15 (28.3%) 38 (71.7%)  
   W 4 (1.5%) 265 (98.5%)  
   C 13 (12.5%) 91 (87.5%)  
   W/C 23 (6.4%) 334 (93.4%)  
Reuse of lines and dialysis equipments    
   < 10 times 21 (5.7%) 348 (94.3%) 0.0009
   ≥ 10 times 60 (13.5%) 384 (86.5%)  
Patients/ HCW ratio    
   1 – 4 19 (4.6%) 396 (95.4%) <0.0001
   5 – 8 60 (13.5%) 223 (86.5%)  
   >9 17 (14.8%) 98 (85.2%)  
  1. Where: B = for HBsAg positive and anti-HCV negative patients, B/C = for HBsAg and/or anti-HCV positive patients, W = for HBsAg and anti-HCV negative patients, C = for HBsAg negative and anti-HCV positive patients, W/C = for patients HBsAg negative but occasionally anti-HCV positive; HCW = health-care workers