Denpong Wongwichit, chatubhong Singharachai, Sirinan Suwanaporn, Wipob Suttana, Piyanut Poolviwat, Montha Phetsuwan, Warunya Srisang, Penpayom Suntharn, Chatuporn Phantakrasem
Men who have sex with men (MSM) are at higher risk for co-infection with hepatitis B virus (HBV), hepatitis C virus (HCV) than the general population . The co-infection accelerates disease progression reciprocally. This study purposed to investigate th e prevalence and the associated factors with HBV and/or HCV co-infection with HIV among MSM in North ern region Thailand in 2015. A case-control study design was conducted by a hospital-based in anti-re troviral (ARV) clinic. 31 of 51 hospitals in the Phayao, Chiang Mai and Chiang Rai province were rec ruited in this study. The result was found 374 total participants who were registered patients in ARV clinic inPhayao84 cases (22.5 %), Chiang Mai 17 0 (45.5%) and Chiang Rai120 (32.1%). The participants were 30-43 year old (47.1%), followed by 16–29 years old (29.9%), and 44–57 years old (19.8%). The majority of occupational were employee (50.0%), follow by merchant (24.9%) and agriculturist (9.4%) .The univariate analysis with a significant α level of 0.05were found six factors had significantly associ ation with HBV and/or HCV with HIV co-infection including (1) age range (2) smoking behavior (3) to ngue piercing, (4) Stavudine drug taking, (5) Tenof ivir drug taking and (6) Nevirapine drug taking. Moreove r, the binary logistic regression at a significant α level of 0.05, after controlling for all possible c onfounding factors, were found four factors signifi cantly association with co-infection including (1) age bet ween 30-43 year old had the risk of co-infection 2. 42 times [odds ratio (OR) = 2.42, 95% confidence inter val (CI) = 1.14–5.14] higher than those who had age range 16-29 year old, (2) smoking behavior in the p articipants had the risk of co-infection 2.05 times (OR = 2.05, 95% CI = 1.12–3.76) higher than no smoking behavior. (3)Tongue piercing in the participants ha d the risk of co-infection 6.82 times (OR = 6.70, 95% CI = 1.12–40.19) higher than no tongue piercing an d (4) Tenofivir drug taking had the risk of co-infect ion 4.30 (OR = 4.30, 95% CI = 2.37–7.84) more than no taking drug. Therefore, enhancing the surveillance and targeted prevention of viral hepatitis includin g improved disease prevention, vaccination coverage, sanitation and food safety, safer sex and efficienc y healthcare delivery
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