Statistical Power

OK, so John Lennon didn’t really write this , but statistical power is a very abstract concept and the ability to "imagine" really helps.

Overview

Power is the probability to detect a difference if it is there.

Of course, your next…

Definition:The Number Needed to treat is the number of patients that you would need to treat to prevent one primary outcome (heart attack, death, stroke, whatever)

• This applies to patients: with the same problem studied
• treated for the same duration as…

Albert and I developed an acute interest in risk reduction at about 3500 feet.

Examples:
Example 1A:

• Consider the benefit of using Coumadin for Stroke prevention in Atrial Fibrillation. Moderate risk patients on placebo have 8% risk of stroke in ONE…

Pickles are associated with all the major diseases of the body. Eating them breeds war and Communism. They can be related to most airline tragedies. Auto accidents are caused by pickles. There exists a positive relationship between crime waves and…