Another type of economic evidence that appears in the medical literature comes from cost of illness studies. Cost of illness studies, also commonly known as burden of illness studies, set out to determine the overall resource consumption associated with a specific illness. Often this is presented in monetary terms and is focused on health care resources. Originally, cost of illness studies covered all major diseases for the purposes of advocating to government for additional health care spending. Lately, studies have been narrower in scope and used for awareness of a specific disease. The purpose of disease-specific cost of illness studies is often to present the case for additional research, funding for care or raise awareness for a specific disease. Table 1 outlines the strengths and weaknesses of each type of economic study design.