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Silent cerebral infarction: a potential risk for pneumonia in the elderly
T Nakagawa1, K Sekizawa, K Nakajoh
1Department of Geriatric Medicine, Tohoku University School of Medicine, Sendai 980-8574 Japan.
Journal of Internal Medicine
|February 26, 2000
Summary
Elderly individuals with silent cerebral infarction, a condition often undetected, face a significantly higher risk of developing pneumonia. Deep brain silent cerebral infarcts are particularly associated with increased pneumonia incidence.
Area of Science:
- Neurology
- Geriatrics
- Infectious Diseases
Background:
- Silent cerebral infarction (SCI) is a common finding in the elderly, often asymptomatic.
- Pneumonia is a leading cause of morbidity and mortality in older adults.
Purpose of the Study:
- To investigate the association between silent cerebral infarction and the subsequent development of pneumonia in community-dwelling elderly individuals.
- To determine if the location of silent cerebral infarction (deep vs. superficial) influences pneumonia risk.
Main Methods:
- A two-year prospective follow-up study of 269 elderly participants without a history of stroke.
- Participants were categorized into groups based on computerized tomography (CT) scans: no infarction (n=102) and silent cerebral infarction (n=167).
- Pneumonia incidence was assessed over the follow-up period.
Main Results:
- The incidence of pneumonia was substantially higher in individuals with silent cerebral infarction (19.8%) compared to controls (4.9%).
- An odds ratio of 4.67 indicated a significantly increased risk of pneumonia in those with SCI.
- Deep silent cerebral infarcts showed a stronger association with pneumonia (29.1%) than superficial infarcts (7.6%).
Conclusions:
- Elderly individuals with silent cerebral infarction are at a greater risk of developing pneumonia.
- Silent cerebral infarcts located in deep brain structures may serve as a critical predictor for pneumonia development in the elderly.