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Related Concept Videos

Longitudinal Research02:20

Longitudinal Research

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Sometimes we want to see how people change over time, as in studies of human development and lifespan. When we test the same group of individuals repeatedly over an extended period of time, we are conducting longitudinal research. Longitudinal research is a research design in which data-gathering is administered repeatedly over an extended period of time. For example, we may survey a group of individuals about their dietary habits at age 20, retest them a decade later at age 30, and then again...
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Chronic Obstructive Pulmonary Disease-II: Pathophysiology01:20

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Chronic Obstructive Pulmonary Disease (COPD) pathophysiology is intricate and multifaceted, involving a complex interplay of physiological processes. Understanding these mechanisms is crucial for effectively managing and treating COPD. Here is an in-depth look at the critical elements in the pathophysiology of COPD:
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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 (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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Longitudinal Studies01:26

Longitudinal Studies

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Longitudinal studies are also widely used in other medical and social science fields. For instance, in cardiovascular research, they can monitor patients' health over decades to identify risk factors for heart disease, such as high cholesterol or smoking, and evaluate the long-term effectiveness of preventive measures. Similarly, in mental health studies, researchers might follow individuals from adolescence into adulthood to understand the development and progression of conditions like...
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COPD: Management Using Bronchodilators and Corticosteroids01:26

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Chronic obstructive pulmonary isease (COPD) involves a group of progressive lung disorders characterized by persistent airflow limitation and chronic respiratory symptoms. Asthma-COPD Overlap Syndrome (ACOS), encompassing features of both asthma and Chronic obstructive pulmonary disease (COPD), is a group of progressive lung disorders that includes chronic bronchitis, emphysema, and refractory (non-reversible) asthma. ACOS leads to complex clinical presentations that combine the inflammatory...
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Unilateral Lung Volume Analysis Using Micro-CT for Enhanced Assessment of Pulmonary Fibrosis in Preclinical Models
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Longitudinal decline in lung function among older construction workers.

John M Dement1, Laura S Welch2, Knut Ringen2

  • 1Division of Occupational and Environmental Medicine, Department of Community and Family Medicine, Duke University Medical Center, Durham, North Carolina, USA.

Occupational and Environmental Medicine
|May 19, 2017
PubMed
Summary
This summary is machine-generated.

Occupational exposures to vapors, gases, dusts, and fumes (VGDF) and pleural plaque significantly reduce lung function over time. Construction workers with higher VGDF exposure and pleural plaque severity experienced accelerated lung function decline.

Keywords:
Pulmonary functionchest radiographydusts and fumesgassesvapors

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Area of Science:

  • Occupational health
  • Pulmonary medicine
  • Radiology

Background:

  • Cross-sectional studies suggest occupational exposures and chest X-ray abnormalities are linked to reduced lung function.
  • Longitudinal data is needed to confirm causal associations between exposures and lung function decline.

Purpose of the Study:

  • To investigate the longitudinal effects of vapors, gases, dusts, and fumes (VGDF) and International Labour Office (ILO) classified chest X-ray abnormalities on lung function reduction.
  • To assess the impact of parenchymal changes, pleural plaque, and diffuse pleural thickening (DPT) on lung function decline in construction workers.

Main Methods:

  • A longitudinal study analyzed chest radiographs and spirometry data from 3150 construction workers with at least one follow-up examination.
  • Developed indices for VGDF exposure, parenchymal changes, pleural plaque, and DPT severity.
  • Longitudinal mixed-effects models were used to analyze lung function changes.

Main Results:

  • Smoking and VGDF exposure were associated with reduced FEV1 and FVC at baseline and accelerated annual decline.
  • High VGDF exposure correlated with a yearly decline of -19.5 mL for FEV1 and -15.7 mL for FVC.
  • Parenchymal abnormalities, pleural plaque, and DPT were strongly linked to reduced FVC; increased pleural plaque severity significantly decreased FVC and FEV1.

Conclusions:

  • Increasing pleural plaque severity is causally associated with progressive loss of FVC and FEV1.
  • VGDF exposures contribute to reduced lung function at baseline and accelerate annual lung function decline.
  • Occupational exposures and pleural abnormalities are significant factors in long-term lung function reduction in construction workers.