After you have crafted your question using the PICO format, another step in the process to to identify the type of question you are asking, and identify the optimal type of research design to answer your question.
Are you asking a question related to a diagnosis? There are four primary question types:
After you choose your question type, now its time to identity the research design. There are different types of research studies you can locate in the primary literature, and different research designs are better suited to answering different types of clinical questions.
The strength of the evidence increases the higher you are on the hierarchy. Your risk of bias increases and the strength of evidence decreases the lower you are on the hierarchy.
Your mnemonic now reads: