Prevalence 06
Prevalence 06 : Medicine. The number of instances of a given disease or other condition in a given population at a designated time; sometimes used to mean prevalence rate. When used without qualification, the term usually refers to the situation at a specified point in time (point prevalence). prevalence, annual (an occasionally used index): The total number of persons with the disease or attribute at any time during a year. It includes cases of the disease arising before but extending into or through the year as well as those having their inception during the year. prevalence, lifetime: The total number of persons known to have had the disease or attribute for at least part of their life. prevalence, period: The total number of persons known to have had the disease or attribute at any time during a specified period. prevalence, Point: The number of persons with a disease or an attribute at a specified point in time. prevalence rate (ratio): The total number of individuals who have an attribute or disease at a particular time (or during a particular period) divided by the population at risk of having the attribute or disease at this point in time or midway through the period. A problem may arise with calculating period prevalence rates because of the difficulty of defining the most appropriate denominator
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