Prognostic factors in influenza-associated encephalopathy

Takashi Nagao, Tsuneo Morishima, Hiroshi Kimura, Syumpei Yokota, Nobuko Yamashita, Takashi Ichiyama, Mana Kurihara, Chiaki Miyazaki, Nobuhiko Okabe

Research output: Contribution to journalArticlepeer-review

43 Citations (Scopus)


Background: Recently, reports of influenza-associated encephalopathy have increased worldwide. Given the high mortality and morbidity rates attributable to this severe neurologic complication of influenza, we conducted a nationwide study in Japan to identify the prognostic factors. Methods: We retrospectively evaluated 442 cases of influenza-associated encephalopathy that were reported to the Collaborative Study Group on Influenza-Associated Encephalopathy, which was organized by the Japanese Ministry of Health, Labor, and Welfare in collaboration with hospitals, clinics, and local pediatric practices in Japan between 1998 and 2002. The outcome for each patient was classified as either survival or death. Predictors of death were identified using logistic regression analysis. Results: Four major prognostic factors for death were found to be significant by multivariate analysis (P < 0.05) in the 184 patients for whom we had complete data: elevation of aspartate aminotransferase, hyperglycemia, the presence of hematuria or proteinuria, and use of diclofenac sodium. Conclusions: We identified patients who had factors associated with a poor prognosis, and these findings might be clinically useful for the management of this illness.

Original languageEnglish
Pages (from-to)384-389
Number of pages6
JournalPediatric Infectious Disease Journal
Issue number5
Publication statusPublished - May 2008
Externally publishedYes


  • IL-6
  • TNF-α
  • diclofenac
  • hypercytokinemia
  • nfluenza-associated encephalopathy

ASJC Scopus subject areas

  • Pediatrics, Perinatology, and Child Health
  • Microbiology (medical)
  • Infectious Diseases


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