In comparison to the general population, major mental illness is associated with higher rates of heart disease, stroke, and diabetes. These problems can result in a life span that can be up to 25 years shorter than in people without a major mental illness. This study uses established medical tests that can predict how you might be affected. The purpose of this study is to compare the risk for these disorders in people with schizophrenia with the risk for these disorders in other people without schizophrenia.