"Overall prevalence" refers to the total occurrence or frequency of something in a given population or group. It gives an idea of how widespread a particular thing or condition is within the entire population being studied. Full definition
«The high overall prevalence of food insecurity and cost - related medication underuse highlights how difficult successful chronic disease management in the current social environment is,» says lead investigator Seth A. Berkowitz, MD, Division of General Internal Medicine, Massachusetts General Hospital and Harvard Medical School. (sciencedaily.com)
The UK study showed a significant reduction (about 22 %) in overall prevalence in people aged 65 years in 2011 than the predicted estimates in 1990, resulting in stabilisation of estimated numbers of people with dementia. (sciencedaily.com)
A rather similar overall prevalence rate of 50,0 % has been found in a more recent study of foster youth aged 11 - 17 years. (capmh.biomedcentral.com)