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Table 1 Baseline characteristics of PWUD in relation to the presence of HBV, anti-HCV and HIV (n = 253)

From: Seroprevalence of hepatitis B virus infection, anti-HCV antibodies and HIV and knowledge among people who use drugs attending methadone therapy clinic in Tanzania; a cross-sectional study

Variable Total (n = 253) HBV +(n = 9) HBV – (n = 244) P value HCV + (n = 9) HCV- (n = 244) P value HIV + (n = 32) HIV – (n = 221) P value
Sex     a    a    < 0.001
 Male 230 (90.9) 9 (3.9) 221(90.6)   9(3.9) 221(90.6)   20(62.5) 210(95.0)  
 Female 23(9.1) 0 23(9.4)   0 23(9.4)   12(37.5) 11(4.9)  
Age groups           
 18–24 32 (12.7) 0 32(13.1) a 0 32(13.1) a 6(18.8) 26(11.8) 0.27
 25–30 96 (37.9) 0 96(36.3) a 2(22.1) 94(38.5) 0.32 3(9.4) 93(42.1) < 0.001
 31–35 51 (20.2) 3(33.3) 48(19.7) 0.32 2(22.2) 49(20.1) 0.88 7(21.9) 44(19.9) 0.79
 36–40 38(15.0) 4(44.4) 34(13.9) 0.01 4(14.4) 34(13.9) 0.01 8(25.0) 30(13.6) 0.09
 41–45 25(9.9) 1(11.1) 24(9.8) 0.89 1(11.1) 24(9.8) 0.89 6(18.8) 19(8.6) 0.07
 46–50 9(3.6) 1(11.1) 8(3.3) 0.21 0 9(3.7) a 2(6.3) 7(3.2) 0.38
 > 50 2(0.8) 0 2(0.8) a 0 2(0.8) a 0 2(0.9) a
Marital     0.51    0.95    0.02
 Single 143(56.5) 4(2.8) 139(56.9)   5(55.6) 138(56.6)   12(37.5) 131(59.3)  
 Married/cohabiting 110(43.5) 5(55.6) 105(43.0) 0.46 4(44.4) 106(43.4)   20(62.5) 90(40.7)  
Education     0.65    0.29    0.08
 Primary or below 180 (71.2) 7(77.8) 173(70.9)   5(55.6) 175(71.7)   27(84.4) 153(69.2)  
 Secondary and above 73 (28.9) 2(22.2) 71(29.1)   4(44.4) 69(28.3)   5(15.6) 68(30.8)  
Drug history
Types of drugs     0.78    0.78    0.88
  Opioids only 179(70.8) 6(66.7) 173(70.9)   6(66.7) 173(70.9)   23(71.9) 156(70.6)  
  Opioids + other drugs 74(29.3) 3(33.3) 71(29.1)   3(33.3) 71(29.1)   9(28.1) 65(29.4)  
Route
  Injection only 32(12.7) 3(33.3) 29(11.9) 0.05 2(22.2) 30(12.3) 0.58 3(9.4) 29(13.1) 0.55
  Snorting only 97(38.3) 0 97(39.8) a 2(22.2) 95(38.9) 0.38 9(28.1) 88(39.8) 0.20
  Both 124(49.0) 6(66.7) 118(48.4) 0.28 5(55.6) 119(48.8) 0.69 20(62.5) 104(47.1) 0.10
Duration of drug use
 < 5 years 39(15.4) 0 39(15.9) a 0 39(15.9) a 3(9.4) 36(16.3) 0.56
 5–10 years 136(53.8) 4(44.4) 132(54.1) 0.57 4(44.4) 132(54.1) 0.56 15(46.9) 121(54.8) 0.40
 > 10 years 78(30.8) 5(55.6) 73(29.9) 0.60 5(55.6) 73(29.9) 0.10 14(43.8) 64(28.9) 0.09
  1. a Not computed because of zero observation