“Incidence” can be defined as:

Question

BlackTom AI · Accepted Answer

The question asks for a definition of ‘incidence.’
Since the answer options are not provided, I will focus on explaining the core concept and why the given correct-definition statement is accurate.
Option provided: 'The rate at which new cases of a disease occur in a specific population.' This description aligns with the standard epidemiological definition of incidence, which measures the occurrence of new disease events over a defined time period within a defined population. It is distinct from prevalence, which counts all existing cases at a given time, regardless of when they began.
Key distinctions to reinforce: incidence is time-bound and cohort-specific, often expressed as cases per person-time (e.g., per 1,000 person-years) or as a proportion over a defined period. This allows researchers to assess risk and the speed of spread, and to compare between populations or time periods.
If there were other options, we would evaluate them for whether they refer to new cases (incidence) versus existing cases (prevalence), cumulative cases over a fixed period, or measures that describe the burden without regard to time. We would also look for any option that incorrectly emphasizes non-new cases, or that conflates incidence with mortality or cure rates.
In sum, the statement given as the correct answer captures the essential, distinctive meaning of incidence in epidemiology: it is the rate at which new disease cases arise in a defined population over a specified period.

GLBH20_WI25_A00 Course Comprehension Quiz #1

“Incidence” can be defined as:

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