Source:http://linkedlifedata.com/resource/umls/id/C0021149
MSH: The number of new cases of a given disease during a given period in a specified population. It also is used for the rate at which new events occur in a defined population. It is differentiated from PREVALENCE, which refers to all cases, new or old, in the population at a given time.,NCI: The number of new cases of a disease diagnosed each year.,CHV: incidence,CHV: incidence,CHV: incidence,NCI: The relative frequency of occurrence of something.