National Institute for Occupational Safety and Health
This figure depicts types of epidemiological studies in a hierarchy.
The weight of evidence for causality increases with the height or level on the figure. The highest study is “Controlled human exposure” within a box labeling it as the only experimental study type.
The other study designs are contained within a box labeling observational studies. They are further divided into analytic and descriptive types with the analytic designs above the descriptive designs in the hierarchy. Two analytic studies types are shown to be (listed from most weight of evidence to least) longitudinal and cross-sectional. Two sub-categories of longitudinal study designs are mentioned (listed from most weight of evidence to least): cohort and case-control.
Three descriptive study designs are given (from most weight of evidence to least): ecologic, case series, and case report.
https://creativecommons.org/publicdomain/mark/1.0/PDMCreative Commons Public Domain Mark 1.0falsefalse
This media file is uncategorized.
Please help improve this media file by adding it to one or more categories, so it may be associated with related media files (how?), and so that it can be more easily found.
Please notify the uploader with
{{subst:Please link images|File:Epidemiologic study hierarchy.png}} ~~~~
Captions
Human epidemiologic study hierarchy
Items portrayed in this file
depicts
copyright status
public domain
applies to jurisdiction: United States of America
determination method: work of the federal government of the United States
File history
Click on a date/time to view the file as it appeared at that time.
Uploaded a work by National Institute for Occupational Safety and Health from https://www.cdc.gov/niosh/docs/2020-106/pdfs/2020-106revised032020.pdf with UploadWizard
File usage
The following pages on the English Wikipedia use this file (pages on other projects are not listed):