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A case control study to assess risk factors for hepatitis C among a general population in a highly endemic area of northwest Tunisia.. Etude de cas témoin populationnelle sur les facteurs de risque de l'infection par le VHC dans une zone de haute endémicité dans le Nord Ouest de la Tunisie
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International audience. A matched case-control study was undertaken in 2004 in Béja, north-western Tunisia, to evaluate potential risk factors for hepatitis C infection. Cases were anti-HCV positive subjects screened in 1996 serosurvey. HCV seronegative controls (5 per case) were selected in the proximity of cases and matched for age and gender. A standardized questionnaire was used to collect demographic, socioeconomic, social behavior, medical and surgical history information. Matched odds ratios (OR) and adjusted OR (AOR) and their 95% CI were calculated in multivariate analysis using logistic regression. 57 HCV positive cases (mean age 61.63 +/- 14,84; 68.4 % female) and 285 HCV negative controls (mean age 60.95 +/- 14.66; 68.4 % female) were enrolled. Multivariate analysis revealed that intravenous drug injections (AOR=1.96; 95%CI[1.02-3.8] p=0.045), past history of invasive procedures (AOR=2.53; 95%CI[1.21-5.29] p=0.0014) and medical history of hypertension (AOR=2.31; 95%CI [1.17-4.56]p=0.015) were significantly associated to HCV infection. These results suggest that nosocomial transmission of HCV infection in north-west Tunisia is common.
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