Factors associated with an HCV positive test in participants tested in the prison population and in the general population, 2004–2010 (n= 4977) using an averaging approach
| Prison screening centre | General population screening centre | |||
|---|---|---|---|---|
| Explanatory variables | IRR (95% CI) | Akaike weights (level of evidence) | IRR (95% CI) | Akaike weights (level of evidence) |
| Drug snorting without injection | ||||
| No | 1 | 1 | ||
| Yes | 2.21 (1.39 to 3.52) | 0.99 (strong) | 2.12 (1.05 to 4.29) | 0.75 (weak) |
| Drug injection without snorting | ||||
| No | 1 | 1 | ||
| Yes | 32.25 (20.07 to 51.84) | 1 (very strong) | 47.07 (24.24 to 91.4) | 1 (very strong) |
| Drug injection with snorting | ||||
| No | 1 | 1 | ||
| Yes | 30.91 (21.25 to 44.95) | 1 (very strong) | 30.31 (17.24 to 53.32) | 1 (very strong) |
| Tattoo/piercing | ||||
| No | 1 | 1 | ||
| Yes | 1.22 (0.92 to 1.61) | 1.13 (0.74 to 1.72) | ||
| Sexual intercourse with an HCV+ person | ||||
| No | 1 | 1 | ||
| Yes | 1.21 (0.66 to 2.2) | 0.50 (weak) | 1.9 (0.86 to 4.2) | 0.30 (no) |
| 0.35 (no) | ||||
| Do not know | 0.9 (0.62 to 1.31) | 0.18 (no) | 1.27 (0.75 to 2.14) | |
| Sharing toiletry items | ||||
| No | 1 | 1 | ||
| Yes | 1.44 (0.84 to 2.47) | 1.38 (0.69 to 2.75) | ||
| Do not know | 0.7 (0.47 to 1.06) | 0.65 (weak) | 0.72 (0.41 to 1.26) | 0.40 (no) |
| Haemodialysis | ||||
| No | 1 | 1 | ||
| Yes | 0.91 (0.32 to 2.58) | 0.27 (no) | 0.45 (0.06 to 3.39) | 0.35 (no) |
| History of incarceration | ||||
| No | 1 | |||
| Yes | – | – | 0.93 (0.55 to 1.58) | 0.28 (no) |
| Endemic HCV level in native country | ||||
| Low* | 1 | 1 | ||
| Medium or high† | 0.79 (0.51 to 1.23) | 0.40 (no) | 1.36 (0.81 to 2.29) | 0.41 (no) |
| Year‡ | ||||
| 2004 | 1 | 1 | ||
| 2005 | 0.92 (0.6 to 1.39) | 0.82 (0.46 to 1.47) | ||
| 2006 | 0.9 (0.59 to 1.38) | 0.66 (0.33 to 1.31) | ||
| 2007 | 0.94 (0.61 to 1.45) | 0.52 (0.24 to 1.1) | ||
| 2008 | 0.58 (0.35 to 0.94) | 0.38 (0.19 to 0.74) | ||
| 2009 | 0.37 (0.21 to 0.65) | 0.19 (0.07 to 0.56) | ||
| 2010 | 0.51 (0.31 to 0.84) | 0.38 (0.17 to 0.84) | ||
| Gender‡ | 1 | 1 | ||
| Man | 1.04 (0.63 to 1.72) | 0.39 (0.09 to 1.64) | ||
| Woman | ||||
| Age‡ | 1.07 (1.05 to 1.08) | 1.06 (1.04 to 1.09) | ||
*Low endemic area: France, DOM-TOM, north European countries, North and South America.
†Medium endemic area: north and sub-Saharan African countries, Asia, Pacific and Asian—subcontinent; High endemic area: Middle East countries.
‡All possible models were adjusted for all eligible variables.
HCV, hepatitis C virus.