Total | 100 | 67 | 101.6 | 66 | 51 to 84 | |
Gender | | | | | | |
Male | 66 | 44 | 63.0 | 70 | 51 to 94 | |
Female | 34 | 23 | 38.6 | 60 | 38 to 89 | 0.54 |
Age ,(y) | | | | | | |
Under 21 | 57 | 39 | 59.4 | 66 | 47 to 90 | |
≥21 | 43 | 28 | 42.3 | 66 | 44 to 96 | 0.98 |
Employment | | | | | | |
Unemployed | 88 | 63 | 89.5 | 70 | 54 to 90 | |
Working (or at school) | 12 | 4 | 12.2 | 33 | 9 to 84 | 0.13 |
Current sexual relationship | | | | | | |
No partner/non-injecting partner | 68 | 45 | 70.5 | 64 | 47 to 85 | |
Partner injects | 29 | 20 | 26.9 | 74 | 45 to 115 | 0.57 |
Unknown | 3 | 2 | 4.2 | 48 | 5.8 to 172.0 | |
Imprisoned before first test | | | | | | |
No | 55 | 35 | 65.1 | 54 | 37 to 75 | |
Yes | 36 | 25 | 26.9 | 93 | 60 to 137 | 0.03 |
Unknown | 9 | 7 | 9.7 | 72 | 29 to 149 | |
Time since onset of injecting (months) | | | | | | |
1 to 12 | 67 | 47 | 63.6 | 74 | 54 to 98 | |
13 or more | 33 | 20 | 37.7 | 53 | 32 to 82 | 0.21 |
Principal drug injected | | | | | | |
Heroin | 72 | 45 | 75.8 | 59 | 43 to 79 | |
Other or combination | 28 | 22 | 25.9 | 85 | 53 to 129 | 0.17 |
Daily drug expenditure | | | | | | |
Up to Ir£65 | 76 | 48 | 80.4 | 60 | 44 to 79 | |
More than Ir£65 | 24 | 19 | 21.0 | 90 | 54 to 141 | 0.12 |
Route of opioid use‡ at first testing | | | | | | |
Not all injected | 18 | 7 | 27.1 | 26 | 10 to 56 | |
All injected | 67 | 50 | 53.6 | 93 | 69 to 123 | 0.006 |
Unknown | 15 | 10 | 21.0 | 48 | 23 to 88 | |
Benzodiazepine misuse§ | | | | | | |
No | 50 | 33 | 55.3 | 60 | 41 to 84 | |
Yes | 45 | 29 | 40.3 | 72 | 48 to 103 | 0.46 |
Unknown | 5 | 5 | 6.0 | 83 | 27 to 194 | |
Imprisoned between tests | | | | | | |
No | 77 | 48 | 69.1 | 69 | 51 to 92 | |
Yes | 15 | 12 | 21.9 | 55 | 28 to 96 | 0.46 |
Unknown | 8 | 7 | 10.7 | 65 | 26 to 135 | |
Addiction treatment between tests | | | | | | |
None or less than 3 months treatment | 67 | 42 | 56.2 | 75 | 54 to 101 | |
More than 3 months | 31 | 23 | 44.4 | 52 | 33 to 78 | 0.16 |
Unknown | 2 | 2 | 1.1 | 182 | 22 to 657 | |