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Evidence Based Practice

ASK: Clinical Questions & Study Design

Knowing what type of studies are available can be helpful in both focusing the clinical question and determining the what type of evidence or study is needed to help answer the question and obtain the most appropriate study type to guide research. The chart below defines question types and and matches them with study designs that might best help to answer the question.

Click table to enlarge.


Knowledge Check: What type of study would best help answer the question: "In patients with Type 2 diabetes and obesity, is bariatric surgery more effective than standard medical therapy at increasing the probability of remission of diabetes?"

A) Case Control Study
B) Cohort Study
C) Randomized Controlled Trial (RCT)