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The visual analog scale (VAS) and its equivalent visual analog pain scale are psychometric scales that are commonly used by doctors in hospitals and clinics to perform pain scale surveys in order to understand the varying degrees of pain or discomfort experienced by a patient.
The visual analog scale (VAS) is a measure used to assess the severity of pain felt by individuals. It consists of a 10-15 cm long line with the left side representing no pain with a happy face picture and the right side representing the greatest agony ever with a frowning face image.
As we know what a visual analog scale is, let us learn about some of its uses.
Here are the uses of the visual analogue scale;
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There are two types of scale;
This scale type consists of circles at equal distances, and the respondent must choose a circle based on the preferred choice.
Respondents can demonstrate their degree of agreement using a slider that contains adjectives about the topic at two extreme ends of the scale and various intermediate words that connect the two. Respondents may provide specific input on the survey question, making this scale popular with both respondents and survey producers.
The main benefits of using this scale are;
The main drawbacks of using this scale are;
e.g., assessing the importance of distance from the verbal anchor. This is the disadvantage of not using restricting categories. Although VAS allows patients to make finely graded evaluations, it can have a detrimental impact if questions are unclear or patients are unsure how to build an assessment since instructions on how to formulate an assessment are insufficient.
When evaluating VAS scores, similar challenges may arise. While a small number of categories may be usefully interpreted and verbal descriptions ascribed to them, the interpretation of (raw) VAS scores is less obvious.
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The score is calculated by measuring the distance (mm) on the 10-cm line between the “no pain” anchor and the patient’s mark with a ruler, yielding a range of values ranging from 0-100. A higher score implies more intense discomfort.
Based on the pain distribution VAS scores in post-surgical patients who described their post-operative pain intensity as – none, mild, moderate, or severe.
This is how the score is interpreted in the scale
There are no normative values available.
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