Early disease detection and prevention through screening examinations may improve awareness, may lead to longer survival and may lead to more cures. A type of examination known as a screening examination is used to reduce the potential risks of the disease. Individuals who do not experience any symptoms of such disease usually undergo this kind of examination. This examination has the objective of detecting potential health disorders. Screening examinations are used to determine a subset of the population who needs additional testing to identify the presence or absence of the disease.