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Korean Journal of Preventive Medicine 1997;30(2): 267-278.
The Incidence of Hepatitis B in Military Service ad the Effect of Asymptomatic HBsAg Carriers on the Incidence.
Rock Kwon Kim, Il Suh, Hung Mo Nam, Kwang Hyub Han
1Pusan Military Hospital, Korea.
2Department of Preventive Medicine, Yonsei University College of Medicine, Korea.
3Department of Medicine, Yonsei University College of Medicine, Korea.
ABSTRACT
The purpose of this study was to investigate the incidence rate of hepatitis B in the military service and to examine the effect of the asymptomatic HBsAg carriers on the incidence of hepatitis B. The subject were 223,270 men who were conscripted to the Korean Army from 1991 to 1994 year. According to the conscripted year, four conscription cohort were constructed. At the screening examination for military service no test for hepatitis B were performed in 1991 and 1992. In 1993, a screening test for hepatitis B were performed and those who were confirmed as HBsAg positive or > or = SGPT 100IU were excluded from conscription. In 1994, the criteria for conscription was changed and those who were HBsAg positive were not excluded from conscription. Only those who were > or =SGPT 100IU were excluded. The main results were as follows ; 1. The positive rate of HBsAg is 5.5% in the conscripted men. 2. The incidence rates of the hepatitis B in 1991 and 1992 conscription cohort were 9.96 and 8.10 per ten thousand per son - year, respectively. The incidence rate of the hepatitis B was 1.34 per ten thousand per son - year in 1993 conscription cohort which was confirmed as HBsAg negative at the screening test, and 7.41 per ten thousand per son - year in 1994 conscription cohort which included the HBsAg positive. 3. The incidence rate of hepatitis B was 99.98 per ten thousand per son- year in HBsAg positive group and 2.25 per ten thousand per son - year in HBsAg negative group. The incidence rate of the group with high SGPT and HBsAg positive was 255 times higher than that of normal population. 4. The incidence of hepatitis B in HBsAg negative group did not increase even though the probability of personal contact with HBsAg positive had been increased. From the above result s, the men who have high SGPT with HBsAg positive should be excluded from military service, and it can not be said that asymptomatic HBsAg carrier s influence on the hepatitis B incidence among the HBsAg negative through personal contact.
Key words: incidence rate; military service; hepatitis B; asymptomatic HBsAg carriers
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