Magnetic domain patterns as self-organizing critical systems.
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Journal Article↗
Biomedical subjects
X Che
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[A population-based study on types of viral hepatitis].
The epidemiological features of various types of acute viral hepatitis in 5 regions of Sichuan Province (211,639) population) form Feb.16, 1987 to Feb 15, 1988 were studied. One-year surveillance was carried out and the results showed an incidence rate of 167.74 per 100,000 for acute viral hepatitis. The proportional distribution of HA,HB,non-A,non-B Hepatitis (HNANB), Hepatitis with EBV (HEB), Hepatitis with CMV (HCM) and Mixed infection in all the patients being 24.51%, 38.31%, 24.51%, 3.38%, 3.38% and 5.92%, respectively. There was a proportion of 14.93% for superinfection. The incidence differences in these regions ranged from 110.30 per 100,000 to 299.95 per 100,000. The incidence of hepatitis peaked in spring, and the sex ratio (male:female) for acute viral hepatitis was 1.75:1 (P less than 0.001). There was a peak of attack rate for HA in 0-19 age group. The incidence of HB in 20-39 age group was obviously higher than that in other age groups. For HNANB, a relatively high attack rate was noticed in 5-19 age group, but no significant age-differences were noted for HEB,HCM and Mixed. Of 355 patients with acute viral hepatitis, 43.94% had a history of contact, and 36.62% a history of injection.
Adolescent↗