Estudio multicéntrico de Prevalencia de Infección por el VIH y factores asociados en las prisiones de Espa？a

objective: to determine the prevalence and associated factors of hiv infection amongst inmates in spain. material and methods: observational and transversal study (june 2008). for 62,000 inmates an "n" of 364 was determined (5% variability, error correction α 5% and 10% missing). 18 prisons were randomly selected and 21 inmates/prison. frequency measurement: prevalence. magnitude of the association: odds ratio of prevalence (orp) with 95%. statistical significance p<0.05. results: 371 prisoners were studied (91.6% male, 66.9% ≤ 40 years, 60.6% spanish, 23.5% idu and 71.2% incarcerated <5 years). hiv prevalence was 10.8% (ci: 7.5 to 14). 85% were co-infected with hcv, 12.5% with hbv and hcv and 63.2% with m. tuberculosis. this represents a proportion to the prison population of 9.2%, 1.3% and 6.7% respectively. hiv infection was associated with: a) > 40 years (p <0.01), b) imprisoned> 5 years (p <0.001), c) non-arab (p <0.01), d) spanish nationality (p <0.001), e) idus (p <0.001), f) co-infected with hcv (p <0.001), and g) co-infected with hbv (p <0.001]. multivariate analysis confirmed the association: a) ≥ 40 years [or = 2.66 (ci : 1.16-6.07), b) idu [or = 28.08 (ic-9.61-81.99), c) infected with hcv [or = 6.96 (ci :1.90-25.39)], and d) infected with hbv [or = 13.52 (ci = 1.76-103.82). conclusion: the prevalence of hiv infection among prisoners in spain is 10.8%. those that are infected are usually idus and over 40 years. 85% are co-infected with hcv and 12.5% with hbv and hcv.