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Summary
| Description |
English: Human epidemiologic study hierarchy |
| Date | March 2020 |
| Source | https://www.cdc.gov/niosh/docs/2020-106/pdfs/2020-106revised032020.pdf |
| Author | 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.
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
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| current | 16:24, 18 July 2024 | | 625 × 564 (46 KB) | KrystinCarlson | 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 |
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