Prevalence of chronic hepatitis B virus infection, sexual risk behaviors, and hepatitis B vaccination among heterosexual men at sexually transmitted infections clinic, Bangkok, Thailand
Hepatitis B virus (HBV) infection remains a health problem among people in many regions worldwide. The disease can be prevented by vaccination. Risk factors for infection include unprotected sexual intercourse and permucosal exposure to infected blood or other fluid. The objectives of this study were to (1) estimate prevalence of chronic HBV infection (2) describe sexual risk behaviors, and (3) estimate coverage of HBV vaccination among male patients attending STIs clinic. We conducted a retrospective descriptive study using 827 medical records sampled from male patients visiting the clinic between October 2013 and September 2016. Descriptive statistics, 95% Confidence Interval, and Chi-square test were employed for data analysis. The finding indicated that chronic HBV infection among male patients attending STIs clinic was 3.3% (95% CI 2.3-4.7). Mean age was 36.8 years (SD = 12.7). In this study, 56.6% of the male patients were diagnosed with STIs. Consistent condom use in the past 3 months was 14.0%. Among those with no history of HBV infection, 17.8% received three doses of compulsory HBV vaccination. Age of patients (25≥ years) has been found to have statistically significant association with having higher HBV immunity (either from past infection or getting HBV vaccination). Therefore, interventions to promote HBV vaccination among male patients attending STIs clinics with the emphasis on a lower age group or those having sexual risk behaviors is highly recommended.
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