How are Visual Analog Scales Used in Epidemiological Studies?
In epidemiological studies, VAS are used to capture patient-reported outcomes and other subjective measures. For example, researchers might use a VAS to assess the severity of symptoms in a population suffering from a particular disease or to evaluate the effectiveness of a new treatment. Participants mark a point on the line that represents their perception of their current state, and this mark is then measured and recorded as a numerical value.
