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Risk factors for severe respiratory syncytial virus infection among Alaska native children

Lisa R Bulkow1, Rosalyn J Singleton, Ruth A Karron

  • 1Arctic Investigations Program, National Center for Infectious Diseases, Centers for Disease Control and Prevention, Anchorage, Alaska 99508, USA.

Pediatrics
|February 5, 2002
PubMed

Insights

Breastfeeding significantly lowers the risk of respiratory syncytial virus (RSV) hospitalization in Alaska Native children. Reducing household crowding also appears crucial for preventing RSV-related hospitalizations.

Area of Science:

  • Pediatrics
  • Infectious Diseases
  • Epidemiology

Background:

  • Alaska Native children exhibit a disproportionately high rate of hospitalization for respiratory syncytial virus (RSV) infections compared to other US populations.
  • Understanding the specific risk factors for RSV hospitalization in this vulnerable demographic is critical for targeted public health interventions.

Purpose of the Study:

  • To investigate the factors associated with hospitalization due to respiratory syncytial virus (RSV) infection among Alaska Native children.
  • To identify modifiable and non-modifiable risk factors contributing to severe RSV outcomes in a high-risk population.

Main Methods:

  • A case-control study was conducted in a remote region of southwest Alaska.
  • Case-patients were identified through RSV infection surveillance, and control subjects were selected based on the absence of acute respiratory infection hospitalization.
  • Cord blood samples were collected to measure RSV-neutralizing antibody levels.

Main Results:

  • Breastfeeding demonstrated a protective effect, significantly reducing the risk of RSV hospitalization (odds ratio: 0.34).
  • Underlying medical conditions, particularly prematurity, were associated with a substantially increased risk of hospitalization (odds ratio: 6.25).
  • Environmental factors such as household crowding (≥4 children or crowding index ≥2) were linked to higher hospitalization risks, while maternal RSV-neutralizing antibody levels showed no association.

Conclusions:

  • Encouraging breastfeeding is a key strategy to mitigate the risk of RSV hospitalization in this population.
  • Public health initiatives should focus on reducing household crowding to decrease RSV-related hospitalizations.
  • Addressing underlying medical conditions like prematurity is essential for managing severe RSV cases.
Abstract

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