title: [Epidemiological characteristics of 403 patients with severe acute respiratory syndrome in Haidian district, Beijing].
abstract: OBJECTIVE
  To analyze epidemiological features of severe acute respiratory syndrome (SARS) in Haidian district, Beijing.
  
  
  METHODS
  Each SARS case was interviewed by trained investigator using standardized questionnaire followed a descriptive analysis.
  
  
  RESULTS
  Four hundred and three SARS cases were identified and 27 of them died from March 18 and May 31, 2003. The incidence rate of SARS was 18.0/100,000 with case fatality rate as 6.7% in Haidian district, Beijing. Seventy-four percent of patients were adults with higher risk in age group of 20 - 29 year. SARS patients were scattered around in 32 out of 33 streets and villages in this district. The disease appeared to be sporadic but the case of outbreaks in family or university only seen in three streets. The course of SARS epidemic in this district could be divided into three phases: initial-which last for days, peak-21 days and then rapid decline-for 26 days. Number of patients having had a history of close contact to other SARS were gradually decreasing along with the process of the epidemics (trend chi(2) = 8.800, P = 0.003). Seventy-two point seven percent of the SARS cases had been exposed to the injection in the hospital settings. When the epidemics came to a rapid decline, 85.7% of the patients diagnosed during that period could be traced down to have had the history of contacting SARS cases within their own families. The distribution of occupation was also showed significantly different in the three respective stages (chi(2) = 36.41, P < 0.01). Among the patients who could not be identified as having confirmed contact history, 26.6% having had outward activities and 47.6% of them visited hospitals, especially during the peak stage.
  
  
  CONCLUSIONS
  The intensity of SARS epidemic among the residents of Haidian district was recognized as similar to the other parts of Beijing. Nosocomial infection in hospital settings was most important cause responsible for the transmission of SARS in this district.
authors.affiliation: Haidian Center for Disease Control and Prevention, Beijing 100086, China.
authors.forename: Cheng
authors.initials: C
authors.lastname: Wang
authors.forename: Zhe
authors.initials: Z
authors.lastname: Dun
authors.forename: Si-yan
authors.initials: SY
authors.lastname: Zhan
authors.forename: Pei-yuan
authors.initials: PY
authors.lastname: Sun
authors.forename: Yan
authors.initials: Y
authors.lastname: Liu
authors.forename: Guang-wen
authors.initials: GW
authors.lastname: Cao
authors.forename: An-li
authors.initials: AL
authors.lastname: Qin
authors.forename: Shu-lan
authors.initials: SL
authors.lastname: Dong
authors.forename: Bing-cai
authors.initials: BC
authors.lastname: Wang
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D002648:Child; D002681:China / Q000453:epidemiology; D016358:Contact Tracing; D003428:Cross Infection / Q000635:transmission*; D005192:Family Health; D005260:Female; D006801:Humans; D015994:Incidence; D008297:Male; D008875:Middle Aged; D045169:Severe Acute Respiratory Syndrome / Q000453:epidemiology* / Q000401:mortality / Q000635:transmission; D011795:Surveys and Questionnaires