Asthma in patients hospitalized with pandemic influenza A(H1N1)pdm09 virus infection–United States, 2009

Details

• Alternative Title:
  BMC Infect Dis
• Personal Author:
  Bramley, Anna M ; Skarbinski, Jacek ; Fry, Alicia M ; Finelli, Lyn ; Jain, Seema
• Description:
  Background
  
  Asthma was the most common co-morbidity among patients hospitalized with pandemic influenza A(H1N1)pdm09 [pH1N1] infection. The objective was to compare characteristics of hospitalized pH1N1 patients with and without asthma and assess factors associated with severity among asthma patients.
  
  Methods
  
  Patient data were derived from two 2009 pandemic case-series of U.S. pH1N1 hospitalizations. A case was defined as a person ≥ 2 years old hospitalized with laboratory-confirmed pH1N1. Asthma status was determined through chart review.
  
  Results
  
  Among 473 cases, 29% had asthma. Persons with asthma were more likely to be 2–17 years old (39% vs. 30%, p = 0.04) and black (29% vs. 18%, p < 0.01), and have chronic obstructive pulmonary disease (13% vs. 9%, p = 0.04) but less likely to have pneumonia (37% vs. 47%, p = 0.05), need mechanical ventilation (13% vs. 23%, p = 0.02), and die (4% vs. 10%, p = 0.04) than those without asthma. Among patients with asthma, those admitted to an intensive care unit (ICU) or who died (n = 38) compared with survivors not admitted to an ICU (n = 99) were more likely to have pneumonia on admission (60% vs. 27%, p < 0.01) or acute respiratory distress syndrome (24% vs. 0%, p < 0.01) and less likely to receive influenza antiviral agents ≤ 2 days of admission (73% vs. 92%, p = 0.02).
  
  Conclusions
  
  The majority of persons with asthma had an uncomplicated course; however, severe disease, including ICU admission and death, occurred in asthma patients who presented with pneumonia. Influenza antiviral agents should be started early in hospitalized patients with suspected influenza, including those with asthma.
  
  
• Subjects:
  Adolescent Adult Aged Aged, 80 And Over Child Child, Preschool Comorbidity Female Hospitalization Hospital Mortality Humans Influenza, Human Influenza A Virus, H1N1 Subtype Male Middle Aged Young Adult

  More +
• Source:
  BMC Infect Dis. 2013; 13:57.
• Document Type:
  Journal Article
• Place as Subject:
  United States
• Volume:
  13
• Collection(s):
  CDC Public Access
• Main Document Checksum:
  urn:sha256:186b194171e9046d853dfa636fe07b970d85aa755f0b529d6f83f08b12e7eaa8
• Download URL:
  https://stacks.cdc.gov/view/cdc/12429/cdc_12429_DS1.pdf
• File Type:
  [PDF - 191.28 KB ]