By the Public Health Observatory (2012)
Looking only at the numbers of patients currently being treated for a disease does not show the true prevalence and impact on the population’s health. At any given time there are many people who have a disease but are not aware of it because they have not yet been diagnosed. A robust and well-researched disease prevalence model can help commissioners to assess the true needs of their community, calculate the level of services needed and invest the appropriate level of resources for prevention, early detection, treatment and care. Prevalence models provide estimates of underlying prevalence derived from population statistics and scientific research on the risk factors for each disease. The models can also be used to support case-finding by identifying those areas where detection rates are low and targeting enhanced diagnostic activity on them.