American Journal of Epidemiology Vol. 122, No. 3: 411-417
Copyright © 1985 by The Johns Hopkins University School of Hygiene and Public Health
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ACUTE INFECTIONS WITH HEPATITIS B VIRUS IN MEDICAL PERSONNEL DURING A 15-YEAR FOLLOW-UP
Department of Epidemiology, National Bacteriological Laboratory S-105 Stockholm, Sweden
Clinical hepatitis B among hospital staff in Sweden was studied in a 15-year follow-up, divided into three periods. During the first 5-year period, 19691973, 756 cases of hepatitis B were reported among hospital staff, for an attack rate of 102.0 per 100,000 person-years. In the second five-year period, 19741978, the attack rate was 30.4, and in the last five-year period, 19791983, it was 10.4. The decrease in incidence between the first period and the second was significant (p<0.001), as was the difference between the second period and the last (p<0.01). The difference between the incidence in medical personnel and that in the general population of working age in the first period was significant at p<0.001 and during the last period it was significant at p<0.01. No statistical significance was found during the second period, due to the decrease in incidence for both groups, which made the values too scattered. Traditionally high-risk units, such as renal dialysis units, had only three cases reported in the last 5-year period. An overrepresentation of males among nurses and nursing assistants with acute hepatitis B was found.
hepatitis B virus; infection; medical staff; occupation; personnel; hospital
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