Related Experiment Video
Updated: Jun 18, 2026
08:53
High-Throughput Behavioral Aging and Lifespan Assays Using the Lifespan Machine
Published on: January 26, 2024
Ageing in animal populations--an epidemiological perspective
1Veterinary Clinical Sciences, Royal (Dick) School of Veterinary Studies, University of Edinburgh, Edinburgh, UK. m.thrusfield@ed.ac.uk
Journal of Comparative Pathology
|December 4, 2009
Summary
Epidemiology estimates disease occurrence and quantifies risk factors like age. Controlling for age is crucial to avoid misleading results and identify effective disease prevention strategies.
Area of Science:
- Epidemiology
- Biostatistics
Background:
- Epidemiology aims to estimate disease burden and identify risk factors.
- Age is a significant risk factor in multifactorial diseases.
- Epidemiological studies often identify age as a risk factor but may not delve into biological mechanisms.
Purpose of the Study:
- To highlight the role of age in epidemiological studies.
- To explain how age can act as a confounder and effect modifier.
- To emphasize the importance of age adjustment in comparative epidemiology.
Main Methods:
- Utilizing observational study designs (cohort, case-control, cross-sectional).
- Estimating relative risks and odds ratios to quantify risk factor impact.
- Controlling for age in study design and analysis to prevent spurious inferences.
Main Results:
- Age is a recognized risk factor for multifactorial diseases.
- Age can confound or modify the relationship between other risk factors and disease.
- Age adjustment is essential for meaningful comparisons in comparative epidemiology.
Conclusions:
- Epidemiological findings on age can inform disease prevention strategies.
- Proper control of age as a confounder and effect modifier is critical for valid epidemiological conclusions.
- Age and lifespan adjustments are necessary for accurate comparative epidemiology between species.
Related Concept Videos
02:07Conservation of Declining Populations
Conservation of declining population focuses on ways of detecting, diagnosing, and halting a population decline. The approach uses methods to prevent populations from going extinct.
01:26Aging
Aging is a complex biological phenomenon influenced by various processes that affect cellular and systemic functions. Several prominent theories attempt to explain its mechanisms, highlighting cellular limitations, oxidative damage, and hormonal changes as central factors in aging.
Cellular Clock Theory
The cellular clock theory posits that the human lifespan is closely tied to the finite capacity of cells to divide, a phenomenon governed by telomeres, which are protective caps at the ends of...
Cellular Clock Theory
The cellular clock theory posits that the human lifespan is closely tied to the finite capacity of cells to divide, a phenomenon governed by telomeres, which are protective caps at the ends of...
01:27Pharmacodynamics in Geriatric Patients: Effects of Age
Age-related pharmacokinetic changes are extensively documented, but understanding age-related pharmacodynamic alterations is relatively limited. This knowledge gap can be partly attributed to the complexity of developing appropriate measures of drug responses compared to bioanalytical methods for determining drug concentrations.Most information regarding age-related differences in human pharmacodynamics originates from cross-sectional studies. However, these studies assume that observed mean...
01:19The Effect of Aging on Tissues
Several body functions deteriorate with age. The external signs of aging are easily identifiable. For example, the skin becomes dry, less elastic, and thins out, forming wrinkles. The skin of the face begins to appear looser due to a decrease in the levels of elastic and collagen fibers in the connective tissue. Additionally, melanin production in the hair follicle decreases with age, resulting in gray hair. Moreover, the senses of sight and hearing decline, so glasses and hearing aids may...
01:00Pharmacokinetics in Geriatric Patients: Effect of Age on Drug Distribution
Drug distribution in the human body is influenced by several factors, including plasma protein concentration, body composition, blood flow, tissue-protein concentration, and tissue fluid pH. Among these, changes in plasma protein concentration and body composition due to aging significantly affect how drugs are distributed within the body. Specifically, aging is associated with a decrease in albumin levels by about 10% and an increase in α1-acid glycoprotein levels. These alterations are not...
01:15Drug Dosing: Geriatric Patients
Elderly individuals encompass a diverse population with varying degrees of age-related physiological changes. Defining the elderly presents challenges, as the geriatric population is often arbitrarily categorized as individuals older than 65. However, many individuals in this group lead active and healthy lives, with an increasing number surpassing 85 years and falling into the older elderly category. Physiological changes associated with aging impact performance capacity and homeostatic...