Power calculations for the Oregon Medicaid study: Kevin Drum:
Let’s do the math. In the Oregon study, 5.1 percent of the people in the control group had elevated GH [glycated hemoglobin, aka A1C, or colloquially, blood sugar] levels. Now let’s take a look at the treatment group. It started out with about 6,000 people who were offered Medicaid. Of that, 1,500 actually signed up. If you figure that 5.1 percent of them started out with elevated GH levels, that’s about 80 people. A 20 percent reduction would be 16 people.