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Related Concept Videos

Chronic Obstructive Pulmonary Disease-I: Introduction01:20

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Chronic Obstructive Pulmonary Disease (COPD) is a long-lasting respiratory condition requiring continuous attention and care. It is a progressive lung disease that leads to breathing challenges due to airflow obstruction. It manifests as persistent respiratory symptoms and restricted airflow resulting from abnormalities in the airways and alveoli, usually due to long-term exposure to harmful particles or gases. COPD mainly consists of two primary conditions: emphysema and chronic bronchitis.
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Chronic Obstructive Pulmonary Disease-IV: Assessement and Diagnostic Studies01:27

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COPD: Pathogenesis and Clinical Features01:20

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Chronic obstructive pulmonary disease (COPD) is a group of lung conditions that progressively worsen over time, including chronic bronchitis and emphysema. This cluster of diseases collectively leads to a gradual and irreversible decline in lung function over time.
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Other Pulmonary Disorders01:17

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Generation of a Chronic Obstructive Pulmonary Disease Model in Mice by Repeated Ozone Exposure
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Prevalence and Population-Attributable Risk for Chronic Airflow Obstruction in a Large Multinational Study.

Peter Burney1, Jaymini Patel1, Cosetta Minelli1

  • 1National Heart and Lung Institute and.

American Journal of Respiratory and Critical Care Medicine
|November 10, 2020
PubMed
Summary
This summary is machine-generated.

Smoking is a major cause of chronic obstructive pulmonary disease (COPD), but other factors like poor education and air pollution also contribute significantly to chronic airflow obstruction (CAO). Understanding these risks is crucial for public health.

Keywords:
Burden of Obstructive Lung Disease (BOLD) studychronic airflow obstructionmultinational studypopulation-attributable risk

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Area of Science:

  • Respiratory Medicine
  • Epidemiology
  • Public Health

Background:

  • Chronic Obstructive Pulmonary Disease (COPD) is a leading cause of death and disability globally.
  • Smoking and air pollution are identified as primary drivers of COPD.
  • Chronic airflow obstruction (CAO) is a key quantifiable characteristic of COPD.

Purpose of the Study:

  • To estimate the attributable risk of chronic airflow obstruction (CAO) due to various risk factors.
  • To analyze the prevalence of CAO across different global sites.
  • To identify the relative importance of risk factors for CAO in diverse populations.

Main Methods:

  • Cross-sectional study (Burden of Obstructive Lung Disease - BOLD) of 28,459 adults aged ≥40 across 41 global sites.
  • CAO defined as postbronchodilator FEV1/FVC ratio < lower limit of normal.
  • Bayesian hierarchical models used to estimate local relative risks and population attributable risks.

Main Results:

  • Mean CAO prevalence was 11.2% in men and 8.6% in women.
  • Mean population attributable risk for smoking was 5.1% (men) and 2.2% (women).
  • Other significant risk factors included poor education, dusty occupations (≥10 years), low BMI, and tuberculosis history.

Conclusions:

  • Smoking is the primary risk factor for CAO, but its impact varies geographically.
  • In certain regions, poor education, low BMI, and passive smoking are more significant contributors to CAO.
  • Occupational dust exposure and tuberculosis are notable risk factors in specific locations.