Evidence-Based Practice / Unit 6 EBP 0812 short lesson, about 20 seconds
Misconception: Significant Means Important
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The idea
Statistical significance says a result is unlikely to be chance. Clinical significance says it is large enough to matter. Neither implies the other.
In practice
A chance-unlikely difference too small for a patient to notice.
Where people slip
A very large study can make a trivial difference statistically significant. Size of sample and size of effect are different things.
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