True because higher the prevalence of the behavior before the program, the more difficult it becomes to increase the prevalence of the behavior.
Prevalence is the proportion of a particular population found to be affected by a medical condition at a specific time. Prevalence, sometimes referred to as prevalence rate, is the proportion of persons in a population who have a particular disease or attribute at a specified point in time or over a specified period of time.
The prevalence is often useful as it reflects the burden of a disease in a certain population. This is not limited to burden in terms of monetary costs, it also reflects burden in terms of life expectancy, morbidity, quality of life, or other indicators.
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