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Related Concept Videos

Confounding in Epidemiological Studies01:27

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Confounding in statistical epidemiology represents a pivotal challenge, referring to the distortion in the perceived relationship between an exposure and an outcome due to the presence of a third variable, known as a confounder. This variable is associated with both the exposure and the outcome but is not a direct link in their causal chain. Its presence can lead to erroneous interpretations of the exposure's effect, either exaggerating or underestimating the true association. This...
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The key clinical manifestations of Rheumatic heart disease (RHD) include several distinct cardiac symptoms.Carditis, a hallmark of acute rheumatic fever, involves inflammation of the heart's endocardium, myocardium, and pericardium. Chronic RHD often results from recurrent episodes of carditis. Its symptoms include the following:Murmurs are caused by valvular damage, especially to the mitral and aortic valves. Mitral stenosis or regurgitation is common, with characteristic heart murmurs...
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In statistical epidemiology and health sciences, two essential metrics—prevalence and incidence—are fundamental for understanding disease dynamics within a population. These measures enable public health officials, epidemiologists, and researchers to assess the burden of diseases, allocate resources effectively, and design impactful public health policies and interventions.
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Related Experiment Video

Updated: Dec 1, 2025

The bm12 Inducible Model of Systemic Lupus Erythematosus SLE in C57BL/6 Mice
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Explore comorbidities associated with systemic lupus erythematosus: a total population-based case-control study.

J-H Chen1,2, C T-C Lee1

  • 1From the Department of Health Promotion and Health Education, National Taiwan Normal University, 162, He-ping East Road, Section 1, Taipei 106, Taiwan.

QJM : Monthly Journal of the Association of Physicians
|November 9, 2020
PubMed
Summary

Systemic lupus erythematosus (SLE) is linked to many autoimmune conditions, particularly diffuse connective tissue diseases. However, diabetes and pregnancy symptoms show a negative association with SLE onset.

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Area of Science:

  • Rheumatology
  • Immunology
  • Epidemiology

Background:

  • Systemic lupus erythematosus (SLE) incidence and burden are rising globally.
  • Identifying factors contributing to SLE onset and progression is crucial.

Purpose of the Study:

  • To investigate prior comorbidities associated with the incidence of SLE.
  • To explore potential risk and protective factors for SLE development.

Main Methods:

  • A population-based case-control study using Taiwan's National Health Insurance Research Database.
  • Matched 2847 newly diagnosed SLE patients with controls based on gender, age, residence, and insurance premium.
  • Employed multivariate conditional logistic regression with stepwise selection to identify associated comorbidities.

Main Results:

  • 38 prior comorbidities were significantly associated with SLE incidence (32 positive, 6 negative).
  • Autoimmune-related conditions affecting skin, blood, liver, and connective tissues showed strong positive associations.
  • Diffuse diseases of connective tissue (ICD-9-CM 710) had the most robust association (OR = 5.68).
  • Diabetes mellitus and pregnancy-related symptoms demonstrated negative associations with SLE.

Conclusions:

  • Increased awareness of SLE is recommended for patients with multiple autoimmune-related comorbidities.
  • Diabetes mellitus and pregnancy-related symptoms may have a protective role against SLE incidence.
  • Further research is needed to understand the underlying mechanisms and pathogenesis of SLE.