FOUNDATIONAL TERM
prevalence
患病率
Proportion with a target condition at a specified point or during a period.
Study this concept in context
90 · How epidemiology studies disease in populations
Case counts become informative through denominators, time, and credible comparison. Hypothetical data illustrate prevalence, incidence risk, and association measures, while study design, bias, confounding, and causal reasoning explain what conclusions are justified.
Sources
- CDC textbook: Definition of epidemiology
- CDC textbook: Descriptive epidemiology
- CDC textbook: Measures of morbidity
- CDC textbook: Analytic epidemiology
- CDC textbook: Measures of association
- CDC: Analyzing and interpreting data
Definitions come from the published lessons. Read the linked lesson for mechanisms, conditions and examples.