Variable

Effective

N

HBsAg positive

%

IC95%

P-value

Anti-HCV positive

%

IC95%

P-value

Heroin

0.675

0.795

Yes

167

11.8

[6.2 - 21.1]

2.5

[0.8 - 06.9]

No

156

9.8

[5.4 - 17.2]

2.0

[0.5 - 7.0]

Cocaine

0.927

0.874

Yes

59

11.7

[3.1 - 34.6]

2.5

[0.7 - 8.0]

No

264

10.9

[6.6 - 17.5]

2.2

[0.8 - 6.0]

Crack

0.545

0.142

Yes

115

9.4

[4.7 - 17.7]

3.9

[1.3 - 10.7]

No

208

12.3

[6.5 - 21.9]

1.2

[0.3 - 4.2]

Cannabis

0.386

0.249

Yes

260

12.0

[7.1 - 19.6]

1.7

[0.5 - 5.0]

No

63

7.6

[2.8 - 18.6]

4.5

[1.2 - 15.4]

Benzodiazepine

0.536

0.803

Yes

5

0

-

0

-

No

318

11.17

[6.9 - 17.4]

2.3

[1 - 5.2]