6 million births from 1978 through 2002 in New York State (excluding New York City) were assigned to the comparison population
Sufficient comparison population
sample size to provide a stable target growth rate computation.
While other participating practices did achieve lower Medicare spending growth rates than comparison populations
in their local markets, their savings did not meet the 2% threshold to share in the Medicare savings, Mr.
As presented in Table 1, the demographic profiles of both the PPCP participants and the comparison population
indicated a high degree of similarity.
Without a comparison population
, the investigators cannot even claim that the drug works differently in African Americans.
3) Contrary to the expectation that nonoxynol-9 products might reduce HIV transmission, one study demonstrated that HIV incidence was greater in a high-risk population using nonoxynol-9 than in a comparison population
using a placebo.