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.
Incidence is the frequency with which an event occurs within a given time period (such as one year). For example, it could be said that the incidence of new breast cancer cases in 2007 demonstrated 50,000 new cases. By contrast, prevalence refers to how many people currently have that condition this year.