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Right arrow Weighing the Evidence

AAP Grand Rounds 17:39-40 (2007)
© 2007 American Academy of Pediatrics

DERMATOLOGY

Weighing the Evidence: How Confident Are You with Confidence Intervals? (Hint: You Might Be Missing Something)

Bernhard L. Wiedermann, MD, FAAP
The first 20% of the full text of this article appears below.

Statistical jargon isn’t particularly useful in everyday medical practice. When was the last time you mentioned P values, t tests, chi-square tests, or confidence intervals in a typical conversation with patients and families? However, I would argue that of the entities named in the previous sentence, the confidence interval (CI) is a concept worth a clinician’s time to understand.

A confidence interval describes the range of plausible values for a result, given the information known from the study. Statistically, a 95% CI describes a range of values inside which the answer would lie 95 times, if the study were repeated 100 times. A more clinically useful description is the range within which we . . . [Full Text of this Article]




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