Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Observational Studies01:11

Observational Studies

Observational studies are a type of analytical study where researchers observe events without any interventions. In other words, the researcher does not influence the response variable or the experiment's outcome.
There are three types of observational studies – Prospective, retrospective, and cross-sectional.
Prospective Study
Prospective studies, also known as longitudinal or cohort studies, are carried out by collecting future data from groups sharing similar characteristics. One example of...
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...
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 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.
Data Collection by Observations01:08

Data Collection by Observations

Data collection refers to a systematic way of obtaining, observing, measuring, and analyzing accurate information. Observational studies are one of the most widely used methods of data collection. It involves collecting data by observing the behavior and physical characteristics of a sample without making any modifications to the sample.
An astronomer viewing the motion and brightness of stars in the sky and recording the data is an example of observational data collection. A botanist recording...
Comparing the Survival Analysis of Two or More Groups01:20

Comparing the Survival Analysis of Two or More Groups

Survival analysis is a cornerstone of medical research, used to evaluate the time until an event of interest occurs, such as death, disease recurrence, or recovery. Unlike standard statistical methods, survival analysis is particularly adept at handling censored data—instances where the event has not occurred for some participants by the end of the study or remains unobserved. To address these unique challenges, specialized techniques like the Kaplan-Meier estimator, log-rank test, and Cox...

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Practice changing RCT design and rationale: Abbreviated MRI plus AFP <i>vs.</i> ultrasound plus AFP for HCC surveillance in cirrhosis (PREMIUM study).

JHEP reports : innovation in hepatology·2026
Same author

Biological insights into schizophrenia from ancestrally diverse populations.

Nature·2026
Same author

Development and implementation of standardized study enrollment metrics for a VA healthcare system clinical research consortium: A 6-year follow-up assessment.

Contemporary clinical trials·2025
Same author

Addressing challenges and barriers to rural Veteran participation in clinical research within the Veterans Affairs healthcare system.

Contemporary clinical trials communications·2025
Same author

Respiratory syncytial virus vaccine effectiveness among US veterans, September, 2023 to March, 2024: a target trial emulation study.

The Lancet. Infectious diseases·2025
Same author

Biological Insights from Schizophrenia-associated Loci in Ancestral Populations.

medRxiv : the preprint server for health sciences·2024
Same journal

GLP-1 Receptor Agonists and Age-related Macular Degeneration Risk in Diabetes or Non-diabetic Obesity: A Retrospective Cohort Study.

The American journal of medicine·2026
Same journal

Marijuana Use and Acute Myocardial Infarction: Mechanistic Insights, Clinical Implications, and Emerging Challenges.

The American journal of medicine·2026
Same journal

Cave Canem - Beware of the Dog.

The American journal of medicine·2026
Same journal

Risk Factors for 30-day Hospital Readmission After Hospital-at-Home Treatment of Acute Pyelonephritis.

The American journal of medicine·2026
Same journal

Mesenteric Panniculitis.

The American journal of medicine·2026
Same journal

Hypercalcemia and hyperferritinemia in a patient with Graves' disease disease.

The American journal of medicine·2026
See all related articles

Related Experiment Video

Updated: Jun 5, 2026

The Participant-Reported Implementation Update and Score (PRIUS): A Novel Method for Capturing Implementation-Related Data Over Time
06:05

The Participant-Reported Implementation Update and Score (PRIUS): A Novel Method for Capturing Implementation-Related Data Over Time

Published on: February 19, 2021

Observational methods in comparative effectiveness research.

John Concato1, Elizabeth V Lawler, Robert A Lew

  • 1VA Clinical Epidemiology Research Center and VA Connecticut Healthcare System, West Haven, Connecticut 06516, USA. john.concato@yale.edu

The American Journal of Medicine
|December 28, 2010
PubMed
Summary
This summary is machine-generated.

Comparative effectiveness research (CER) uses observational studies, similar to randomized controlled trials (RCTs), to compare treatments. This research highlights methods for accurate results and evaluating studies, particularly within the Veterans Health Administration.

More Related Videos

A Novel Method for Involving Women of Color at High Risk for Preterm Birth in Research Priority Setting
14:43

A Novel Method for Involving Women of Color at High Risk for Preterm Birth in Research Priority Setting

Published on: January 12, 2018

Related Experiment Videos

Last Updated: Jun 5, 2026

The Participant-Reported Implementation Update and Score (PRIUS): A Novel Method for Capturing Implementation-Related Data Over Time
06:05

The Participant-Reported Implementation Update and Score (PRIUS): A Novel Method for Capturing Implementation-Related Data Over Time

Published on: February 19, 2021

A Novel Method for Involving Women of Color at High Risk for Preterm Birth in Research Priority Setting
14:43

A Novel Method for Involving Women of Color at High Risk for Preterm Birth in Research Priority Setting

Published on: January 12, 2018

Area of Science:

  • Health Services Research
  • Clinical Epidemiology

Background:

  • Comparative Effectiveness Research (CER) evaluates medical treatments across diverse patient groups and conditions.
  • Study designs in patient-oriented research commonly distinguish between randomized controlled trials (RCTs) and observational studies.

Purpose of the Study:

  • To elucidate how observational studies yield results comparable in accuracy to RCTs.
  • To identify advanced methodologies for conducting observational studies.
  • To examine observational studies within the Veterans Health Administration (VA) and emphasize core methodological principles.

Main Methods:

  • The overview focuses on comparative effectiveness research (CER) methodologies.
  • It contrasts randomized controlled trials (RCTs) with observational study designs.
  • Specific attention is given to newer methods and case studies from the Veterans Health Administration (VA).

Main Results:

  • Observational studies can achieve accuracy comparable to RCTs when employing rigorous methodologies.
  • Newer methods enhance the validity and reliability of observational research in CER.
  • Evaluations of VA studies underscore the importance of fundamental research principles.

Conclusions:

  • Robust methodological principles are crucial for conducting and evaluating observational studies in CER.
  • Observational studies are valuable tools for CER, offering insights comparable to RCTs.
  • The Veterans Health Administration (VA) provides a significant context for CER studies.