prevalence vs incidence definitions
Prevalence is expressed as a ratio in which the number of events is the numerator and the population at risk is the denominator. See also rate. prevalent, adj. Epidemiology. (1) The number of people with a specific condition or attribute at a specified time divided by the total number of people in the population.
Incidence means how many people get a particular type of cancer. It is often written as the number of cancer cases per 100,000 people in the general population. More than 331,000 people are diagnosed with cancer each year in the UK. That is around 910 people every day.