A nurse is reviewing several research articles found on the web after completing a PICO search. One of the articles provides an expert opinion of a professional society. The nurse interprets this to mean that the information is at which level of evidence?

Question

Quizplus · Accepted Answer

Expert opinions, while valuable, are considered the lowest level of evidence in the hierarchy of evidence because they are based on individual viewpoints rather than empirical research or systematic reviews.

A Nurse Is Reviewing Several Research Articles Found on the Web