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[Typing of hemorrhagic fever with renal syndrome by cluster analysis]
Xiu-hua Guo1, Wu-chun Cao, Liang-ping Hu
1Institute of Microbiology and Epidemiology, Academy of Military Medical Sciences, Beijing 100071, China.
Objective:
To make an inquiry into method of typing of hemorrhagic fever with renal syndrome (HFRS).
Method:
Average monthly rates were calculated on the basis of data from 1995 to 1999, then cluster analysis was carried out to type out endemic areas.
Results:
Compared with the results of 36 surveillance spots from 1980 to 1992, twenty-four surveillance spots had the same results (66.7%). Twenty-three surveillance spots had the same results with the original data in 1999 (82.1%).
Conclusion:
HFRS incidences increased in spring or in summer, but decreased in autumn or in winter. Cluster analysis seemed to be a supplementary method in distinguishing the epidemic types for HFRS.
