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By the Everyday Prevention Evidence Team What Is a Surrogate Outcome vs. a Patient Outcome? A surrogate outcome is a stand-in measurement, such as a lab value or scan result, used because it is …
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By the Everyday Prevention Evidence Team When a health study you're reading about gets a "correction," an "expression of concern," or a "retraction," these are three different things — and they don't …
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By the Everyday Prevention Evidence Team What is the difference between recommendation strength and certainty of evidence? A health guideline gives you two separate ratings, not one. Certainty of …
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By the Everyday Prevention Evidence Team What Does It Mean When a Study Protocol Doesn't Match the Published Report? A study protocol is the plan a research team registers on a public database like …
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By the Everyday Prevention Evidence Team What Does a P-Value Actually Mean in a Health Study? A p-value tells you how surprising a study's results would be if there were really no effect at all. It …
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By the Everyday Prevention Evidence Team What a test-accuracy claim actually means A health test's accuracy claim describes how the test performed in a research study — not what your own result …
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