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NTR 290 - Evidence Based Nutrition

Relevant resources for Evidence-Based Nutrition gathered in one location

Study Design Resources

The following links provide information on defining and identifying types of medical research studies (also referred to as levels of evidence):

Study Design 101

Centre for Evidence Based Medicine (CEBM) - Levels of Evidence

Understanding Research Study Designs - University of Minnesota Bio-Medical Library

Article: Using Meta-analyses for Comparative Effectiveness Research

with permission from:

EBM Resources

The following links provide additional information and explanation of EBM:

UIC University Library - Evidence Based Medicine


Duke University - Introduction to Evidence Based Practice

Types of Studies

Research or Evidence Definition & Example

Analysis of data from a number of independent studies of the same subject in order to determine overall trends and statistical significance.

Example Meta-analysis Article

Systematic Review

An exhaustive and comprehensive review of research and studies (clinical trials) on a particular health related topic. All relevant results are combined and summarized into one published review.

View Example Systematic Review Article 

Randomized Control Trial

(RCT) is a scientific study that randomly assigns participants into a control group to determine whether a cause-effect relationship exists between treatment and outcome.

View Example RCT Article

Cohort Study

A longitudinal study where patients (participants) with a similar health condition are followed over time and compared with another group of patients not affected by the same condition.

View Example Cohort Study Article

Cross-Sectional Study

Observing and collecting data from an entire population at a defined time. Results may be used to describe features of a population, prevalence of a health condition or cause and effect of a particular disease.

View Example Cross-Sectional Study

Case Study

A Case Study is an article that documents an individual case (patient) condition. It is generally used to identify new trends or unexplained conditions or diseases.

View Example Case Study 

with permission from:

Hours and Locations