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Table 3 Socio-demographic and drug consumption variables associated to self-reported co-infection (HIV/HCV). Drug users in Catalonia, 2012

From: Cross sectional study of factors associated to self-reported blood-borne infections among drug users

 

Positive Co-infection HIV/HCV

Negative Co-infection HIV/HCV

Bivariate analysisa

Multivariate analysisb

 

n = 69 (%)

n = 443 (%)

PR (95 % CI)

PR (95 % CI)

Age, median (IQR)

42 [37–45]

37 [32–43]

1.05 (1.03–1.07)

1.01 (0.99–1.04)

Sex

    

 Men

52 (13.27)

340 (86.73)

1

1

 Women

17 (14.17)

103 (85.83)

1.06 (0.64–1.77)

1.62 (1.01–2.60)

Country of birth

    

 Spain

61 (13.20)

401 (86.80)

1

 

 Other countries

7 (14.58)

41 (85.42)

1.11 (0.54–2.29)

 

 Unknown

1 (50)

1 (50)

  

Current marital status

    

 Single

42 (15.27)

233 (84.73)

1

 

 Married

18 (15)

102 (85)

0.97 (0.59–1.62)

 

 Divorced

9 (10.11)

80 (89.89)

0.66 (0.33–1.29)

 

 Unknown

28 (100)

 

Educational level

    

 Primary education or less

24 (15.48)

131 (84.52)

1

 

 Secondary education

25 (12.32)

178 (87.68)

0.79 (0.47–1.33)

 

 Undergraduate education

20 (12.99)

134 (87.01)

0.52 (0.83–0.48)

 

Current employment status

    

 Current regular job

1 (0.90)

110 (99.10)

1

1

 Unemployment

34 (12.27)

243 (87.73)

13.87 (1.92–100.11)

8.16 (1.17–56.92)

 Disabled or retired

33 (33.33)

66 (66.67)

37.67 (5.25–270.38)

14.10 (1.98–100.48)

 Others, including never has worked and worked at home

1 (4)

24 (96)

4.52 (0.29–69.84)

3.24 (0.28–37.89)

Number of years by injecting drug consumption

    

 Non-injecting users

3 (1.05)

283 (98.95)

1

1

 Injection for <6 years

10 (17.24)

48 (82.76)

16.49 (4.68–58.09)

13.04 (3.80–44.78)

 Injection for 6 to 12 years

7 (25.93)

20 (74.07)

24.80 (6.80–90.43)

19.50 (5.39–70.55)

 Injection 13 to 22 years

28 (41.18)

40 (58.82)

39.39 (12.34–125.78)

29.07 (9.06–93.24)

 Injection for >22 years

18 (34.62)

34 (65.38)

33.12 (10.12–108.42)

22.77 (6.90–75.19)

 Injection for unknown time

3 (14.29)

18 (85.71)

13.05 (2.80–60.88)

6.98 (1.25–39.06)

Years after starting drug use, median (IQR)

26 [21–30]

20 [14–27]

1.06 (1.04–1.09)

 

Period of onset of the 1st drug use

    

 2001–2012

1 (1.96)

50 (98.04)

1

 

 1991–2000

12 (6.03)

187 (93.97)

3.06 (0.41–22.99)

 

 1981–1990

42 (21.54)

153 (78.46)

10.93 (1.54–77.51)

 

 1953–1980

13 (20.31)

51 (79.69)

10.36 (1.40–76.58)

 

 Unknown period

1 (33.33)

2 (66.67)

17.00 (1.37–210.31)

 

Heroin use

    

 No

2 (0.93)

214 (99.07)

1

 

 Yes

67 (22.64)

229 (77.36)

24.67 (6.11–99.60)

 

Prison history

    

 No

39 (9.92)

354 (90.08)

1

 

 Yes

30 (25.21)

89 (74.79)

3.90 (2.04–7.45)

 
  1. HCV Hepatitis C virus, HIV human immunodeficiency virus, IQR interquartile range, PR prevalence ratio, CI confidence intervals
  2. aUnivariate Poisson regression models with robust variance
  3. bMultivariate Poisson regression model included covariates determined to be statistically important on the basis of associations with co-infection in the univariate analysis (p < 0.2)