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Related Concept Videos

Asthma: Pathogenesis and Management01:20

Asthma: Pathogenesis and Management

Asthma is a chronic pulmonary condition involving inflammation of the airways, hyper-reactivity, and reversible obstruction of the airways. This condition can significantly impact a person's quality of life, making breathing difficult and leading to distressing symptoms.
Asthma is classified as allergic and non-allergic. Allergens such as dust mites, pollen, and pet dander trigger allergic asthma, while factors like cold air, intense emotions, or exercise can induce non-allergic asthma.
Asthma I: Introduction01:28

Asthma I: Introduction

Asthma is a chronic inflammatory disorder of the airways characterized by variable airflow obstruction and heightened bronchial responsiveness to a wide range of triggers. The underlying inflammation leads to airway swelling, mucus hypersecretion, and smooth muscle constriction, all of which narrow the airway lumen and impede airflow. Clinically, asthma presents with recurrent episodes of wheezing, shortness of breath, chest tightness, and coughing, symptoms that typically vary in intensity and...
Asthma-II: Pathophysiology and Classification01:26

Asthma-II: Pathophysiology and Classification

Asthma is a prevalent chronic respiratory condition marked by inflammation and hyperresponsiveness of the airways. Its pathophysiology involves complex interactions among inflammatory pathways, immune responses, and neural mechanisms.
Additionally, environmental and genetic factors play crucial roles in determining an individual's susceptibility to asthma and the severity of their condition.
Critical processes in asthma pathophysiology include:
Asthma-IV: Diagnostic and Management01:30

Asthma-IV: Diagnostic and Management

The diagnosis and management of asthma are comprehensive, encompassing clinical assessments, lung function tests, and pharmacological interventions. Here's an overview:
Clinical Assessment for Asthma:
This is the first step in diagnosing and managing asthma. It includes:
Asthma-I: Introduction01:29

Asthma-I: Introduction

Asthma is a chronic respiratory ailment that requires careful management due to its varying symptoms and influencing factors. It is characterized by airway inflammation, bronchial hyperresponsiveness, and reversible airflow obstruction, leading to symptoms like wheezing, shortness of breath, chest tightness, and coughing. The symptom frequency and intensity may vary considerably over time. It is also linked to immune system responses to allergens and irritants, highlighting the complex...
Antiasthma Drugs: Mast Cell Stabilizers and Anti-IgE Drugs01:25

Antiasthma Drugs: Mast Cell Stabilizers and Anti-IgE Drugs

Asthma is a chronic respiratory condition for which new therapeutic avenues, including anti-inflammatory drugs like mast cell stabilizers and anti-IgE treatments, continue to be developed.
Mast cell stabilizers, such as cromolyn (also known as sodium cromoglycate) and nedocromil (Tilade), are effective drugs in asthma management. These stabilizers hinder histamine release by skillfully obstructing the activation of mast cells and other cellular entities. Notably, they navigate this task without...

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Related Experiment Video

Updated: May 25, 2026

Murine Model of Allergen Induced Asthma
08:05

Murine Model of Allergen Induced Asthma

Published on: May 14, 2012

Analyzing atopic and non-atopic asthma.

Juha Pekkanen1, Jussi Lampi, Jon Genuneit

  • 1Department of Environmental Health, National Institute for Health and Welfare, P.O. Box 95, 70701 Kuopio, Finland. juha.pekkanen@thl.fi

European Journal of Epidemiology
|February 3, 2012
PubMed
Summary

Defining ‘atopic asthma’ and ‘non-atopic asthma’ is challenging. Analyzing asthma and atopy as separate outcomes, or stratifying by atopy, provides more accurate results for risk factor associations.

Related Experiment Videos

Last Updated: May 25, 2026

Murine Model of Allergen Induced Asthma
08:05

Murine Model of Allergen Induced Asthma

Published on: May 14, 2012

Area of Science:

  • Epidemiology
  • Allergy and Immunology
  • Respiratory Medicine

Background:

  • Accurate asthma phenotyping is crucial for effective treatment and research.
  • Current definitions of ‘atopic asthma’ and ‘non-atopic asthma’ are often based on limited data, leading to potential misclassification.
  • The interplay between asthma and atopy complicates the analysis of risk factors.

Purpose of the Study:

  • To highlight the analytical challenges in defining ‘atopic’ and ‘non-atopic’ asthma phenotypes.
  • To propose a more robust methodology for analyzing asthma phenotypes when only data on asthma and atopy are available.
  • To demonstrate how misclassification can arise from standard analytical approaches.

Main Methods:

  • Utilized the 31-year follow-up data from the Northern Finland Birth Cohort 1966 (n=5,429).
  • Defined ‘atopic asthma’ and ‘non-atopic asthma’ based on skin prick test results at age 31.
  • Employed simple calculations on hypothetical datasets to illustrate analytical problems and solutions.
  • Examined gender and childhood cat ownership as risk factors.

Main Results:

  • ‘Atopic asthma’ and ‘non-atopic asthma’ are not distinct disease entities, complicating their analysis.
  • The association of a risk factor with these phenotypes depends on its relationship with both asthma and atopy.
  • Standard analyses using all non-asthmatics as a comparison group can yield misleading results.
  • Stratified analysis by atopy status provides valid, unconfounded results.

Conclusions:

  • Asthma and atopy should initially be analyzed as separate outcomes when data is limited.
  • When using ‘atopic’ and ‘non-atopic’ asthma as outcomes, stratification by atopy is essential for valid interpretation.
  • This approach ensures accurate identification of risk factors and improves asthma phenotyping.