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The Nationwide Seroprevalence of Anti-HCV Is Decreasing from 2009 to 2015 in South Korea
( Eun Sun Jang ),( Moran Ki ),( Geum-youn Gwak ),( Kyung-ah Kim ),( Gi-ae Kim ),( Do Young Kim ),( Dong Joon Kim ),( Man Woo Kim ),( Sung Eun Kim ),( Yun Soo Kim ),( Young Seok Kim ),( In Hee Kim ),( 대한간학회 2017 춘·추계 학술대회 (KASL) Vol.2017 No.1
Aims: This study aimed to reveal nationwide anti-HCV prevalence in 2015, and to compare it with a previous survey in 2009, South Korea. Methods: A total of 268,422 subjects who underwent health-check examination including anti-HCV antibody in nationwide 33 hospitals from Jan 2015-Dec 2015, were enrolled in this study. For those showing positive anti-HCV, medical records were reviewed to search whether tests of HCV RNA or the antiviral treatment were performed. Results: Age, gender and area-adjusted anti-HCV positive rate was 0.60% (95% CI 0.57-0.63%) based on the estimated standard population of Korea in 2015. Anti-HCV prevalence was higher in females (0.66%, 95% CI 0.61-0.71) rather than in males (0.54%, 95% CI 0.51-0.58). It showed gradual increase according to age (0.38% in 40s, 0.61% in 50s, 1.06% in 60s, and 1.63% in 70s). The most prevalent area of anti-HCV in South Korea was Jeju (1.54%), followed by Gyeongbuk (0.95%), Gyeongnam (0.89%) and Busan (0.88%). Compared to the previous nationwide data in 2009, the odds ratio of adjusted anti-HCV prevalence was 0.70 (95% CI 0.70-0.71), showing 30% decrease of anti-HCV positivity. Among 7 metropolitan cities and 9 provinces, Chungbuk (0.62%, OR 1.22, 95% CI 1.18-1.26) and Jeju (1.54%, OR 5.35, 95% CI 5.00-5.72) showed increased anti-HCV positivity compared to those in 2009. Of 1,359 anti-HCV positive subjects, 776 (57.1%) had tested for HCV RNA, showing an increased testing rate compared to it in 2009 (27.8%). A total of 251 (18.4%) of anti-HCV positive subjects had received antiviral therapy until Dec 2016. Conclusions: The anti-HCV seroprevalence in South Korea decreased from 2009 to 2015. Moreover, subsequent HCV RNA test rate was increased, though not optimal yet. Regional variation of anti-HCV positivity and change of the prevalence warrants continuous monitoring of HCV epidemiology for optimal strategy of national HCV control.
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