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The occurrence of acute otitis media in infants. A life-table analysis
Insights
Acute otitis media (AOM) is common in children, with over 70% experiencing an episode by age two. Incidence rates peak between 6-12 months, with seasonal increases in spring and autumn.
Area of Science:
- Pediatrics
- Epidemiology
- Infectious Diseases
Background:
- Acute otitis media (AOM) is a frequent childhood illness.
- Understanding AOM incidence is crucial for public health strategies.
- Standardized definitions are needed for accurate AOM research.
Purpose of the Study:
- To determine the occurrence and incidence rate of AOM in a large cohort of children.
- To analyze age-specific and seasonal variations in AOM risk.
- To highlight the need for consistent AOM diagnostic criteria in research.
Main Methods:
- Life-table methodology was used for analysis.
- A random sample of 2512 children was monitored up to two years of age.
- Incidence rates and cumulative incidence were calculated.
Main Results:
- Cumulative incidence of first AOM episode by 12 months was 42.4%; by 24 months, it was 71.0%.
- Overall AOM incidence rate was 0.93 episodes per child per year during the first 24 months.
- AOM risk increased between 6-12 months, with peaks in spring and autumn, and decreased in the second year.
Conclusions:
- AOM is a highly prevalent condition in early childhood.
- The study underscores the significant burden of AOM during the first two years of life.
- Consistent case definitions are essential for reliable epidemiological studies of AOM.
Abstract:
A random sample of 2512 children were monitored to an average age of two years to determine the occurrence of acute otitis media (AOM). A life-table methodology was employed in the analysis. The cumulative incidence of the first episode of AOM up to 12 months of age was 42.4% (95% confidence interval 40.4-44.4) and the corresponding figure up to 24 months of age was 71.0% (68.9-73.1). The incidence rate for all acute otitis media episodes was 0.93 episodes per child per year (0.90-0.96) during the first 24 months of life increasing in the spring and autumn. The risk of experiencing an episode of acute otitis media increased at the age of 6-12 months and decreased slowly during the second year of life. The results confirm the frequent nature of acute otitis media and stress the necessity for clear, consistent definition of the criteria for acute otitis media in epidemiological research.