incidensen

Incidensen is a term used in epidemiology in some languages to denote the incidence of a health event—the occurrence of new cases of a disease or condition within a defined population over a specified period. In English, the standard terms are incidence, cumulative incidence, and incidence rate, while incidensen may appear in non-English texts as a direct translation or regional variant.

Incidence can be expressed as a proportion or as a rate. Cumulative incidence equals the number of new cases during the period divided by the population at risk at the start of the period. The incidence rate (or incidence density) equals the number of new cases divided by the total person-time at risk, and is often presented per 1,000 or 100,000 person-years.

Example: in a cohort of 10,000 people followed for one year, 100 develop the disease. Cumulative incidence = 100/10,000 = 0.01 (1%). If these 100 cases accrue over 20,000 person-years, the incidence rate = 100/20,000 = 0.005 per person-year, or 500 per 100,000 person-years.

Incidensen is used to estimate risk, compare populations, monitor trends, and inform public health planning. Its interpretation depends on clear definitions of population at risk, case definitions, and observation time. It is distinct from prevalence, which measures all existing cases at a point in time, not just new ones.

See also: incidence, cumulative incidence, incidence rate, prevalence, cohort study, surveillance.