Invasive Pneumococcal Infections and Prevention Strategies
Author Information
Author(s): Klemets Peter, Lyytikäinen Outi, Ruutu Petri, Ollgren Jukka, Nuorti J Pekka
Primary Institution: National Public Health Institute (KTL), Department of Infectious Disease Epidemiology and Control, Helsinki, Finland
Hypothesis
What is the risk and mortality from invasive pneumococcal disease among persons with and without underlying medical conditions?
Conclusion
Most invasive pneumococcal disease cases and deaths occurred in individuals without a recognized vaccine indication, suggesting a need for new prevention strategies.
Supporting Evidence
- The average annual incidence of IPD was 10.6 cases per 100,000 persons.
- 12% of IPD patients died within one month of the first positive culture.
- 46% of those who died did not have a vaccine indication.
- The highest mortality was observed in patients with alcohol-related diseases and non-haematological malignancies.
Takeaway
Many people get sick from a type of bacteria called pneumococcus, and a lot of them don't have any health problems that would usually make them eligible for a vaccine.
Methodology
Population-based data on invasive pneumococcal disease episodes were linked to national health care registries to analyze risk and outcomes.
Potential Biases
ICD coding in hospital discharge data may be incomplete and subject to misclassification.
Limitations
The study lacked chart reviews to assess illness severity and may have missed some underlying conditions due to registry-based design.
Participant Demographics
The median age of cases was 53 years, with 58% being male.
Statistical Information
P-Value
p<0.05
Confidence Interval
95% CI, 1.6–2.6
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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