Toothbrush Wear (I

question 4

Multiple Choice

Toothbrush wear (i.e. ,splayed,bent,or broken bristles) is influenced more by the brushing method than by the length of time of brushing.The wear is influenced more by the method than by the number of toothbrushings per day.

• A)First statement is true,second statement is false.
• B)First statement is false,second statement is true.
• C)Both statements are true.
• D)Both statements are false.

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Definitions:

Exposure Status

The classification of individuals based on their encountered level of a particular factor, substance, or environmental condition that may influence their health.

Incidence

The number of new cases of a disease that occur in a specified population within a given time period.

Cohort Study

An observational study design that follows a defined group of people (a cohort) over time to assess how their exposures affect their outcomes, useful for identifying risk factors and causation.

Cardiovascular Disease

A class of diseases that involve the heart or blood vessels, including coronary artery disease, hypertension, heart failure, and stroke.