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GlossaryStatistics and interpretation

Victimization rate

A victimization rate relates victimization events to the covered population or households. Learn why repeated experiences differ from unique victims.

A victimization rate measures how frequently qualifying victimizations occur relative to the population or households covered by the measure. It counts victimization experiences, not necessarily distinct people. The denominator, offense scope, period, and rate scale must be stated together.

People and households are different bases

In NCVS terminology, personal victimization rates are generally expressed per 1,000 persons age 12 or older. Household property-crime rates use incidents per 1,000 households. Applying the same denominator to both would change the meaning of the measure. BJS dashboard definitions

A survey estimate also uses weights rather than treating each interview as one person in the total population. BJS explains that person, household, incident, and victimization weights serve different analytical purposes. Published uncertainty matters when comparing the resulting rates. BJS survey methodology

The rate can include covered events that were not reported to police. A police-recorded crime rate has a different source and may have a different offense definition or population basis. The two should not be treated as interchangeable simply because both express crime relative to population.

Example

Hypothetical example: In a simplified population of 1,000 eligible people, 15 people experience one qualifying victimization each and five people experience two each. There are 25 victimizations affecting 20 distinct people. The victimization rate is 25 per 1,000 people.

The share victimized at least once is two percent, or 20 of 1,000. That is a prevalence measure, not the same statistic as 25 victimizations per 1,000. The distinction remains important in weighted survey estimates even though the actual calculations are more complex.

Common confusion

A victimization rate is not automatically the percentage of people victimized. Repeat victimization allows the event count to exceed the number of distinct victims. BJS specifically distinguishes prevalence, which counts people experiencing at least one event, from victimization frequency. BJS prevalence explanation

Nor is it a count of criminal convictions. Respondents describe experiences that meet survey definitions; the estimate does not depend on every event producing an identified offender or judicial finding.

Comparing rates

Match the covered ages, offense categories, reporting-to-police status, time period, and methodology. Consider confidence intervals or the publication's significance tests before describing a small difference as an increase. A national survey rate should not be presented as a precise estimate for a small locality unless the survey product expressly supports that geography.

Sources