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Table 5 Multivariate analysis of selected independent variables with Anti-HBc

From: Hepatitis B virus infection among medical waste handlers in Addis Ababa, Ethiopia

Independent variables N (%) Anti-HBc
n (%)
B S.E p-value Exp(B) 95% C.I.for EXP(B)
        Lower upper
age      .021    
30-39 38 (30.1) 16 (42.1) 20.9 1.54 .999 1.14 .000  
40-49 37 (29.4) 30 (83.8) 43.5 1.96 .998 7.65 .000  
50-59 12 (9.5) 2 (16.7) 40.1 1.96 .998 2.55 .000  
sex(male) 40 (31.7) 26 (65) 21.6 8.48 .998 2.38 .000  
Length of employment      .993    
6-10 33 (26.2) 15 (45.5) 0.28 1.73 1.000 1.33 .000  
11-15 31 (24.6) 18 (58.1) 0.36 2.45 1.000 1.44 .000  
> 15 26 (20.6) 14 (53.8) 0.65 2.45 1.000 1.92 .000  
Education
(primary or less)
58 (46) 28 (48.3) -20.5 1.21 .999 .000 .000  
Splash exposure(yes) 35 (27.8) 18 (51.4) -3.3 2.35 1.000 .04 .000  
Tattooing (yes) 21 (16.7) 2 (9.5) -18.4 8.03 .998 .000 .000  
Blunt-penetrating injuries (yes) 25 (19.8) 15 (60) 2.1 2.37 1.000 7.91 .000  
History of surgery (yes) 5 (4) 1 (20) -17.6 6.64 .998 .000 .000  
No risk factors(yes) 25 (19.8) 24 (96) 37.5 1.08 .997 1.91 .000  
  1. N = Total number of MWHs in each category
  2. n = number positive for Anti-HBc