What question did this study set out to answer?

To evaluate the effectiveness of influenza vaccination in reducing hospitalizations and deaths due to influenza-related conditions.

October 27, 1993JAMA

Clinical effectiveness of influenza vaccination in Manitoba

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To evaluate the effectiveness of influenza vaccination in reducing hospitalizations and deaths due to influenza-related conditions.
Case-control study design with noninstitutionalized persons aged 45 and older in Manitoba.
Utilized linked health records to analyze vaccination impact during influenza outbreak periods from 1982 to 1986.
Adjusted for prior high-risk conditions in hospital discharge and ambulatory care.
Vaccination prevented 32% to 39% of hospital admissions for pneumonia and influenza.
Effective in reducing hospital deaths by 43% to 65% for these conditions.
Overall effectiveness in preventing deaths from all causes ranged from 27% to 30%.

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Implication

Case-control study assesses influenza vaccination's effectiveness in preventing hospitalizations and deaths in older adults, suggesting considerable benefits.

Cite This Study

David S. Fedson (1993) studied this question.

synapsesocial.com/papers/6a066741b6bc505e0873a72d https://doi.org/10.1001/jama.270.16.1956

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Implication

Case-control study assesses influenza vaccination's effectiveness in preventing hospitalizations and deaths in older adults, suggesting considerable benefits.

Clinical effectiveness of influenza vaccination in Manitoba

Key Points

Discussion

Implication

Cite This Study

Clinical effectiveness of influenza vaccination in Manitoba

Key Points

Discussion

Implication

Cite This Study

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