Table 2 Prevalence ratios and 95% confidence intervals between the presence of reactive HCV, the factors investigated and the behavioral data in the patients from Pelotas (n = 318)

Health Professional

0.712

-

No

55

18.0

Ref. (1)

-

-

-

Yes

3

23.1

1.28

0.46; 3.55

-

-

Blood transfusion

0.732

-

No

12

16.2

Ref.(1)

-

-

-

Yes

46

18.9

1.16

0.65; 2.01

-

-

Use of injectable drugs

0.153

0.037

No

56

17.8

Ref. (1)

-

Ref. (1)

-

Yes

2

50.0

2.8

1.02; 7.69

4.16

1.08; 15.9

Syringe sharing

0.998

0.587

No

52

18.4

Ref. (1)

-

Ref. (1)

-

Yes

6

17.1

0.93

0.43; 2.00

0.76

0.31; 2.06

Inhaled cocaine

0.998

0.381

No

57

18.3

Ref. (1)

-

Ref. (1)

-

Yes

1

16.7

0.90

0.14; 5.53

0.51

0.12; 2.24

Tattoo, piercing, acupuncture

0.438

0.300

No

12

18.8

Ref. (1)

-

Ref. (1)

-

Yes

46

11.5

0.61

0.21; 1.82

0.56

0.18; 1.67

HIV

0.332

0.184

No

57

18,1

Ref. (1)

-

Ref. (1)

Yes

1

50.0

2.76

0.67; 9.23

2.35

0.85; 6.44

HBV

0.006

<0.001

No

53

17.0

Ref. (1)

-

Ref. (1)

Yes

5

62.5

3.65

2.02; 6.59

3.41

1.82; 6.38

STD in the past year

0.049

0.098

No

45

16.4

Ref. (1)

-

Ref. (1)

Yes

13

29.5

1.80

1.06; 3.05

1.48

0.83; 2.65

Use of condom long-term partner

0.416^†

0.452

Never

38

16.6

Ref. (1)

-

Ref. (1)

Always

6

17.6

1.06

0.45; 2.51

1.08

0.34; 3.40

Sometimes

14

25.5

1.53

0.83; 2.83

2.07

0.59; 7.17

Use of condom occasional partner

0.673^†

0.723

Never

38

16.9

Ref. (1)

Ref. (1)

Always

6

20.0

1.18

0.50; 2.80

0.99

0.29; 3.37

Sometimes

14

22.2

1.32

0.71; 2.43

0.66

0.19; 2.24