Terrence Howard plays a music mogul in a new series on Fox. CHICAGO â In the presidential suite of a Hilton hotel, above a ballroom full of extras waiting to shoot a lavish party scene, sat the two lead actors of âEmpire,â a new Fox series about a feuding entertainment-industry family.
Prevalence is a statistical concept referring to the number of cases of a disease that are present in a particular population at a given time, whereas incidence refers to the number of new cases that develop in a given period of time.
Prevalence is often expressed as a percentage, calculated by multiplying the ratio by 100. The above study expresses prevalence as a percentage, thus the prevalence of incontinence is 8.5% (or rounded is 9%). Another common way of expressing prevalence, particularly if the prevalence is low, is as the number of cases per 100,000 of the population. For example, it is easier to state the result as â66 cases per 100,000 peopleâ than to say the prevalence is 0.00066. Le and Boen (1995) provide further examples of the calculation of prevalence.