In a Health Examination Survey (HES) objective health information is collected among a representative sample of the total population, including those who have no contact with health services. The collection of objective health measures at population level is particularly important for items that are often not accurately reported in a health interview survey (e.g. height and weight) and for diseases that may be present without any symptoms but have important health consequences (e.g. high blood pressure or high cholesterol level in the blood).
