What is an example of primary level of evidence?

What is an example of primary level of evidence?

• A. Systematic reviews
• B. News articles
• C. Original research publications
• D. Editorials

Answer: (C)

Primary evidence consists of reports of new, original research—the first presentation of data from a study, including the methods, results, and investigators’ interpretation. An example of this level is original research publications, such as randomized trials, cohort studies, case-control studies, cross-sectional studies, or case series, where the investigators collect and analyze data and publish the actual findings. Systematic reviews and meta-analyses are secondary evidence because they synthesize and interpret data from multiple original studies rather than presenting new data themselves. News articles report on research findings but are not original studies, and editorials express opinions or commentary rather than new experimental data. So the best example of primary evidence is original research publications.

Primary evidence consists of reports of new, original research—the first presentation of data from a study, including the methods, results, and investigators’ interpretation. An example of this level is original research publications, such as randomized trials, cohort studies, case-control studies, cross-sectional studies, or case series, where the investigators collect and analyze data and publish the actual findings.

Systematic reviews and meta-analyses are secondary evidence because they synthesize and interpret data from multiple original studies rather than presenting new data themselves. News articles report on research findings but are not original studies, and editorials express opinions or commentary rather than new experimental data. So the best example of primary evidence is original research publications.