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Related Concept Videos

Study Designs in Epidemiology01:20

Study Designs in Epidemiology

Epidemiological study designs are fundamental tools for investigating the distribution, determinants, and control of health conditions in populations. They help researchers understand the relationships between exposures and outcomes, and they broadly fall into two categories: "observational" and "experimental" studies.
Observational studies are those where the researcher does not intervene but rather observes natural variations. They include cross-sectional, cohort, and case-control studies.
Bioequivalence Experimental Study Designs: Repeated Measures, Cross-Over, Carry-Over, and Latin Square Designs01:15

Bioequivalence Experimental Study Designs: Repeated Measures, Cross-Over, Carry-Over, and Latin Square Designs

Bioequivalence experimental study designs play a pivotal role in testing the effectiveness of various treatments. Key among these are the repeated measures, cross-over, carry-over, and Latin square designs. In the repeated measures design, each subject receives all treatments, allowing for temporal comparisons. This type of design is useful in reducing variability but requires careful planning to avoid bias.The cross-over design, an economical method, involves sequential administration of...
Study Design in Statistics01:15

Study Design in Statistics

A study design is a set of techniques that allow a researcher to collect and analyze data from different variables defined for a specific research problem. Statistics is commonly for effective study design and more robust experiments,
Does aspirin reduce the risk of heart attacks? Is one brand of fertilizer more effective at growing roses than another? Is fatigue as dangerous to a driver as the influence of alcohol? Questions like these are answered using randomized experiments with proper...
Bioavailability Study Design: Healthy Subjects Versus Patients01:15

Bioavailability Study Design: Healthy Subjects Versus Patients

Bioavailability studies are essential for evaluating a drug's therapeutic efficacy and understanding its absorption patterns under various physiological conditions. Conducting such studies on target patient populations provides more relevant data by simulating real-world disease states. However, practical challenges often necessitate the use of young, healthy adult volunteers as study subjects.Patients may exhibit altered drug absorption patterns due to the effects of the disease itself,...
Longitudinal Research02:20

Longitudinal Research

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...
Types of Biopharmaceutical Studies: Controlled and Non-Controlled Approaches01:23

Types of Biopharmaceutical Studies: Controlled and Non-Controlled Approaches

Biopharmaceutical studies constitute a vital field aiming to enhance drug delivery methods and refine therapeutic approaches, drawing upon diverse interdisciplinary knowledge. In research methodologies, the choice between controlled and non-controlled studies significantly influences the study's reliability and accuracy.
Non-controlled studies, commonly employed for initial exploration, lack a control group, rendering them susceptible to biases and external influences. In contrast, controlled...

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A Within-Subject Experimental Design using an Object Location Task in Rats
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The Rotterdam Study: 2010 objectives and design update.

Albert Hofman1, Monique M B Breteler, Cornelia M van Duijn

  • 1Department of Epidemiology, Erasmus Medical Center, PO Box 2040, 3000 CA Rotterdam. The Netherlands. a.hofman@erasmusmc.nl

European Journal of Epidemiology
|September 4, 2009
PubMed
Summary

The Rotterdam Study is a long-term population study investigating multiple diseases in older adults. Its extensive research has yielded nearly 1,000 publications on cardiovascular, neurological, and other health conditions.

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Area of Science:

  • Epidemiology
  • Gerontology
  • Public Health

Background:

  • The Rotterdam Study, initiated in 1990, is a major prospective cohort study in the Netherlands.
  • It focuses on a wide range of age-related diseases, including cardiovascular, endocrine, hepatic, neurological, ophthalmic, psychiatric, and respiratory conditions.
  • The cohort includes a substantial number of participants aged 45 and over.

Purpose of the Study:

  • To investigate the etiology, incidence, and progression of various chronic diseases in an aging population.
  • To provide a comprehensive understanding of health and disease patterns in older adults.
  • To serve as a foundation for numerous research articles and reports, contributing significantly to scientific knowledge.

Main Methods:

  • Prospective cohort study design.
  • Longitudinal data collection from a large population sample.
  • Ongoing research with regular updates to objectives and methodologies.

Main Results:

  • The study has generated a vast body of research, with close to 1,000 publications.
  • Findings cover a broad spectrum of diseases affecting older individuals.
  • The research provides critical insights into disease risk factors and outcomes.

Conclusions:

  • The Rotterdam Study is a vital resource for understanding age-related diseases.
  • Its comprehensive data collection and extensive research output have significantly advanced medical knowledge.
  • The study continues to provide valuable insights into public health and aging.