Measles-related hospitalizations and complications in Japan, 2007-2008

Hideo Yasunaga1, Yongjin Shi, Masato Takeuchi

  • 1Department of Health Management and Policy, Graduate School of Medicine, The University of Tokyo, Tokyo. yasunagah-jyo@h.u-tokyo.ac.jp

Abstract

Insights

Severe measles hospitalization in Japan (2007-2008) primarily affected young children and young adults, with pneumonia being a common complication. Pregnant women experienced adverse outcomes, highlighting the need for continued disease monitoring.

Area of Science:

  • Infectious Diseases
  • Epidemiology
  • Public Health

Background:

  • Measles is a highly contagious viral illness.
  • Severe measles cases necessitate hospitalization, posing a significant public health concern.
  • Understanding clinical features and complications of hospitalized measles patients is crucial for effective management.

Purpose of the Study:

  • To describe the clinical characteristics of severe measles cases requiring hospitalization in Japan.
  • To identify and analyze related complications in hospitalized measles patients.
  • To examine demographic factors, including age, pregnancy, and malignancy, associated with severe measles.

Main Methods:

  • Utilized the Diagnosis Procedure Combination (DPC) inpatient database for patient records from July to December 2007 and 2008.
  • Extracted data on hospitalized patients diagnosed with measles.
  • Analyzed patient demographics, age distribution, and complication rates, including those related to pregnancy and malignancy.

Main Results:

  • A total of 1,037 inpatients were identified across 377 hospitals.
  • Two age peaks were observed: children ≤4 years (21%) and young adults aged 15-29 years (45%).
  • Common complications included pneumonia (8.7%), encephalitis (2.1%), and intestinal issues (0.7%). Pneumonia was more prevalent in younger patients (≤14 years).

Conclusions:

  • The study provides valuable insights into the clinical presentation of severe measles.
  • Hospitalized measles patients, particularly young adults and children, face significant complications like pneumonia.
  • Continued surveillance using the DPC database is essential for tracking measles trends.

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