| Shared needles % (N) | Unadjusted PR (95% CI) | p value | Adjusted PR (95% CI) | p value |
---|---|---|---|---|---|
Sociodemographic characteristics* | Â | Â | Â | Â | Â |
 18–24 | 22.9 (19) | Ref |  | Ref |  |
 25–34 | 32.9 (62) | 1.44 (0.92–2.25) | 0.108 | 1.01 (0.71–1.42) | 0.978 |
 > 35 | 38.2 (13) | 1.67 (0.93–2.99) | 0.084 | 0.91 (0.57–1.45) | 0.698 |
Biological sex | Â | Â | Â | Â | Â |
 Male | 30.7 (77) | Ref |  | Ref |  |
 Female | 30.4 (17) | 0.98 (0.64–1.53) | 0.963 | 1.68 (1.09–2.59) | 0.019 |
Education | Â | Â | Â | Â | Â |
 Primary education or less | 23.4 (11) | Ref |  |  |  |
 Some secondary education | 21.5 (17) | 0 .92 (0.47–1.79) | 0.805 |  |  |
 Completed secondary or above | 36.5 (66) | 1.56 (0.89–2.71) | 0.116 |  |  |
Marital status** | Â | Â | Â | Â | Â |
 Single | 29.7 (75) | Ref |  |  |  |
 Cohabitating/Married | 33.3 (11) | 1.12 (0.66–1.88) | 0.669 |  |  |
 Divorced/Separated/Widow | 36.8 (7) | 1.24 (0.66–2.31) | 0.501 |  |  |
Occupation | Â | Â | Â | Â | Â |
 Unemployed | 25.4 (43) | Ref |  | Ref |  |
 Employed/ Student | 36.9 (51) | 1.45 (1.03–2.04) | 0.031 | 1.58 (1.19–2.11) | 0.002 |
Self-reported sexual orientation*** | Â | Â | Â | Â | Â |
 Heterosexual | 27.4 (59) | Ref |  | Ref |  |
 Homosexual | 28.6 (10) | 1.04 (0.58–1.84) | 0.889 | 1.08 (0.75–1.55) | 0.667 |
 Bisexual | 44.6 (25) | 1.63 (1.13–2.34) | 0.009 | 1.46 (1.03- 2.07) | 0.034 |
Drug Injection related behaviors, access to needles and condom use | Â | Â | Â | Â | Â |
Age at first injection | Â | Â | Â | Â | Â |
 Before 18 years | 30.2 (16) | Ref |  |  |  |
 18 to 24 years | 33.3 (44) | 1.10 (0.68–1.78) | 0.683 |  |  |
 Over 25 years | 27.9 (34) | 0.92 (0.56–1.52) | 0.754 |  |  |
Duration of drug injection**** | Â | Â | Â | Â | Â |
 Less than 3 years | 20.3 (26) | Ref |  | Ref |  |
 4–5 years | 30.5 (32) | 1.50 (0.95–2.35) | 0.077 | 1.05 (0.74–1.48) | 0.791 |
 Over 5 years | 50.7 (36) | 2.49 (1.65–3.77) | 0.001 | 1.25 (0.83–1.89) | 0.281 |
Needle sharing at the first injection | Â | Â | Â | Â | Â |
 No | 15.4 (36) | Ref |  | Ref |  |
 Yes | 79.5 (58) | 5.16 (3.73–7.13) | 0.001 | 2.18 (1.59–2.99) | 0.001 |
Needle reuse in the previous 6Â months | Â | Â | Â | Â | Â |
 No | 9.8 (20) | Ref |  | Ref |  |
 Yes | 71.8 (74) | 7.32 (4.74–11.31) | 0.001 | 2.27 (1.51–3.43) | 0.001 |
Number of needles sharing partners in the previous 6Â months | Â | Â | Â | Â | Â |
 Two or less | 21.9 (54) | Ref |  | Ref |  |
 More than two partners | 90.9 (40) | 4.14 (3.21–5.34) | 0.001 | 0.99 (0.79–1.25) | 0.983 |
Selling sex for drugs in the previous 6Â months***** | Â | Â | Â | Â | Â |
 No | 24 (49) | Ref |  | Ref |  |
 Yes | 42.5 (40) | 1.77 (1.26–2.48) | 0.001 | 1.08 (0.79–1.46) | 0.607 |
Access to sterile needles | Â | Â | Â | Â | Â |
 Always | 19.4 (38) | Ref |  | Ref |  |
 Sometimes | 52.5 (53) | 2.71 (1.92–3.81) | 0.001 | 1.10 (0.84–1.44) | 0.477 |
Sharing other drug paraphernalia in the previous 6Â months | Â | Â | Â | Â | Â |
 No | 19.4 (38) | Ref |  | Ref |  |
 Yes | 52.5 (53) | 9.38 (6.19–14.21) | 0.001 | 3.56 (2.19- 5.81) | 0.001 |