[Typing of hemorrhagic fever with renal syndrome by cluster analysis].
OBJECTIVE
To make an inquiry into method of typing of hemorrhagic fever with renal syndrome (HFRS).


METHODS
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%).


CONCLUSIONS
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.
Guo
Xiu-hua
XH
Institute of Microbiology and Epidemiology, Academy of Military Medical Sciences, Beijing 100071, China.
Cao
Wu-chun
WC
Hu
Liang-ping
LP
Zhou
Shi-guo
SG
Zhang
Xi-tan
XT
Chen
Hua-xin
HX
D000818:Animals; D002681:China / Q000453:epidemiology; D016000:Cluster Analysis; D004197:Disease Reservoirs; D018063:Hantaan virus / Q000302:isolation & purification; D006480:Hemorrhagic Fever with Renal Syndrome / Q000453:epidemiology*; D006801:Humans; D015994:Incidence; D011156:Population Density; D012621:Seasons; D018571:Sentinel Surveillance