Nineteen percent of the patients had suffered a tear in an artery, most often in the carotid (neck) artery, and 17 percent had suffered an aneurysm (a bulge in an artery), most often in the renal (kidney) artery, the study authors reported in a symposium news release.
and analyzed with no less care than studies intended to examine risk-fac-tor associations with cancer. If proper care is not taken, descriptive studies will divert scientific resources, especially public health department resources, away from more productive activities. Descriptive epidemiology studies can also be used to evaluate cancer
Epidemiology of cancer. The epidemiology of cancer is the study of the factors affecting cancer, as a way to infer possible trends and causes. The study of cancer epidemiology uses epidemiological methods to find the cause of cancer and to identify and develop improved treatments. This area of study must contend with problems of lead time bias and length time bias.