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Table 2 Socio-demographic and drug consumption variables associated to self-reported HCV, from drug users in Catalonia, 2012

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

 

HCV positive

HCV negative

Bivariate analysisa

Multivariate analysisb

 

n = 203 (%)

n = 309 (%)

PR (95 % CI)

PR (95 % CI)

Age, median (IQR)

42 [37–46]

35 [31–41]

1.05 (1.04–1.06)

1.02 (1.01–1.03)

Sex

    

 Men

159 (40.56)

233 (59.44)

1

1

 Women

44 (36.67)

76 (63.33)

0.9 (0.69–1.17)

1.15 (0.99–1.36)

Country of birth

    

 Spain

179 (38.74)

283 (61.26)

1

 

 Other countries

22 (45.83)

26 (54.17)

1.19 (0.86–1.65)

 

 Unknown

2 (100)

  

Current marital status

    

 Single

112 (40.73)

163 (59.27)

1

 

 Married

51 (42.50)

69 (57.50)

1.04 (0.8–1.33)

 

 Divorced

33 (37.08)

56 (62.92)

0.9 (0.66–1.22)

 

 Unknown

7 (25)

21 (75)

 

Educational level

    

 Primary education or less

71 (45.81)

84 (54.19)

1

 

 Secondary education

80 (39.41)

123 (60.59)

0.86 (0.67–1.09)

 

 Undergraduate education

52 (33.77)

102 (66.23)

0.73 (0.55–0.97)

 

Current employment status

    

 Current regular job

17 (15.32)

94 (84.68)

1

1

 Unemployment

109 (39.35)

168 (60.65)

2.62 (1.65–4.15)

1.52 (1.15–2.56)

 Disabled or retired

69 (69.70)

30 (30.30)

4.63 (2.93–7.32)

1.77 (1.30–2.40)

 Others, including never has worked and worked at home

8 (32.0)

17 (68.0)

2.13 (1.04–4.37)

1.51 (1.12–2.06)

Number of years by injecting drug consumption

    

 Non–injecting users

16 (5.59)

270 (94.41)

1

1

 Injection for <6 years

35 (60.34)

23 (39.66)

10.82 (6.44–18.2)

5.88 (3.27–13.74)

 Injection for 6 to 12 years

23 (85.19)

4 (14.81)

15.28 (9.25–25.23)

7.88 (4.46–13.94)

 Injection 13 to 22 years

63 (92.65)

5 (7.35)

16.62 (10.28–26.88)

7.77 (4.40–13.74)

 Injection for >22 years

52 (100)

17.94 (11.14–28.88)

7.98 (4.49–14.19)

 Injection for unknown time

14 (66.67)

7 (33.33)

11.42 (6.45–20.21)

5.89 (3.14–11.03)

Years after starting drug use, median (IQR)

26 [20–30]

17 [12–23]

1.07 (1.05–1.08)

5.80 (3.09–10.91)

Period of onset of the 1st drug use

    

 2001–2012

2 (3.92)

49 (96.08)

1

 

 1991–2000

46 (23.12)

153 (76.88)

5.87 (1.47–23.36)

 

 1981–1990

111 (56.92)

84 (43.08)

14.44 (3.69–56.49)

 

 1953–1980

43 (67.19)

21 (32.81)

17.13 (4.36–67.37)

 

 Unknown period

1 (33.33)

2 (66.67)

8.5 (1.04–69.35)

 

Heroin use

    

 No

10 (4.63)

206 (95.37)

1

1

 Yes

193 (65.20)

103 (34.80)

14.21 (7.72–26.19)

2.86 (1.42–5.75)

Prison history

    

 No

124 (31.55)

269 (68.45)

1

 

 Yes

79 (66.39)

40 (33.61)

3.35 (2.41–4.65)

 
  1. HCV Hepatitis C 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 reported infection in the univariate analysis (p < 0.2)