Subclinical encephalopathy in chronic obstructive pulmonary disease
Olga Maria Pinto de Lima1, Ricardo de Oliveira-Souza, Omar da Rosa Santos
1Escola de Medicina e Cirurgia, Universidade Federal do Estado do Rio de Janeiro, Brazil. ompl@oi.com.br
Chronic obstructive pulmonary disease (COPD) is linked to subtle cognitive decline, even without dementia. This study found lower cognitive scores in COPD patients, suggesting a subclinical encephalopathy.
Area of Science:
- Neurology
- Pulmonology
- Cognitive Science
Background:
- Chronic obstructive pulmonary disease (COPD) is increasingly recognized as having systemic effects beyond the lungs.
- Evidence suggests a link between COPD and various mental symptoms, including cognitive impairment.
Purpose of the Study:
- To investigate if COPD causes cognitive impairment in patients without dementia or acute confusion.
- To identify a potential subclinical cognitive deficit associated with COPD.
Main Methods:
- Assessed global cognitive status using the Brazilian version of the Mini-Mental State Exam (MMSE).
- Compared 30 patients with COPD (without dementia/confusion) to 34 healthy controls.
Main Results:
- COPD patients exhibited significantly lower MMSE scores compared to controls.
- Cognitive impairment was inversely related to COPD severity.
- Findings were independent of factors like age, education, sleepiness, hypoxemia, smoking, or comorbidities.
Conclusions:
- COPD is associated with a subclinical encephalopathy.
- This condition is characterized by subtle global cognitive ability impairment.
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