title: Characteristics and validity of a web-based Kawasaki disease surveillance system in Japan.
abstract: BACKGROUND
  Although regular nationwide surveys of Kawasaki disease (KD) are conducted in Japan, there is no system for detecting the real-time epidemic status of this disease.
  
  
  METHODS
  A web-based surveillance system for KD was developed. After consideration of the number of patients reported by prefecture to the 19th nationwide survey, 355 pediatric departments were asked to participate in the surveillance, and 225 agreed. Since January 2008, pediatricians in these 225 hospitals have reported KD patient data immediately after diagnosis. The daily numbers of patients are available to the public via the internet at http://www.kawasaki-disease.net/kawasakidata/. The validity of the data in 2008 was evaluated using the Japanese 20th nationwide survey of KD as the gold standard.
  
  
  RESULTS
  A total of 3376 patients were reported to the web-based surveillance system from the 1st week through 52nd week of 2008. The number of patients reported to the nationwide survey during the same period was 11 680: a total of 4950 patients from the hospitals participating in the web-based surveillance and 6730 from other hospitals. The epidemic curves were similar, and the correlation coefficient between the web-based surveillance and the total numbers in the nationwide survey was 0.806 (P < 0.01).
  
  
  CONCLUSIONS
  The web-based surveillance system for Kawasaki disease in Japan demonstrated good validity.
authors.affiliation: Department of Public Health, Jichi Medical University, Shimotsuke, Tochigi, Japan. nakamuyk@jichi.ac.jp
authors.forename: Yosikazu
authors.initials: Y
authors.lastname: Nakamura
authors.forename: Mayumi
authors.initials: M
authors.lastname: Yashiro
authors.forename: Ryusuke
authors.initials: R
authors.lastname: Ae
authors.forename: Izumi
authors.initials: I
authors.lastname: Chihara
authors.forename: Atsuko
authors.initials: A
authors.lastname: Sadakane
authors.forename: Yasuko
authors.initials: Y
authors.lastname: Aoyama
authors.forename: Kazuhiko
authors.initials: K
authors.lastname: Kotani
authors.forename: Ritei
authors.initials: R
authors.lastname: Uehara
authors.forename: Shohei
authors.initials: S
authors.lastname: Harada
mesh_terms: D058872:Epidemics; D005260:Female; D006306:Health Surveys; D006776:Hospitals, Pediatric; D006801:Humans; D007223:Infant; D020407:Internet; D007564:Japan / Q000453:epidemiology; D008297:Male; D009080:Mucocutaneous Lymph Node Syndrome / Q000453:epidemiology*; D011159:Population Surveillance / Q000379:methods*; D015203:Reproducibility of Results
references.citation: Pediatr Infect Dis J. 1995 Jan;14(1):69-71
references.pmid: 7715997
references.citation: Nihon Eiseigaku Zasshi. 1986 Dec;41(5):836-42
references.pmid: 3573396
references.citation: J Epidemiol. 2010;20(4):302-7
references.pmid: 20530917
references.citation: Nihon Koshu Eisei Zasshi. 2000 Dec;47(12):1029-35
references.pmid: 11201145
references.citation: J Epidemiol. 2008;18(4):167-72
references.pmid: 18635901
references.citation: Nihon Koshu Eisei Zasshi. 1996 Feb;43(2):102-10
references.pmid: 8901214