After adjustment for age , cocaine use and alcohol dependence as well as suicidal risk , living in a couple with a non-drug user and in a couple with a drug user were both independent predictors of HCV risk practices ( OR [ CI95 % ] = 4.16 [ 1.42-12 .12 ] ; OR [ CI95 % ] = 9.85 [ 3.13-31 .06 ] , respectively ) .