Which of the following methods is commonly used to assess pain levels?

The Visual Analog Scale (VAS) is a commonly used method for assessing pain levels because it provides a simple, effective way for patients to communicate their pain intensity. This scale typically consists of a straight line, often 10 centimeters long, with one end representing "no pain" and the other end indicating "worst pain imaginable." Patients mark a point on the line that corresponds to their pain level, allowing healthcare providers to quantify and document pain.

The VAS is advantageous because it can be used for patients of all ages and can be easily understood by individuals who may struggle with descriptive terminology related to pain. It is a subjective measure that captures the patient's personal experience of pain, which is crucial for tailoring treatment plans effectively.

Other methods like CT scans, X-rays, and blood tests are primarily used for diagnostic purposes rather than for direct assessment of pain levels. These imaging and laboratory tests help in identifying underlying causes of pain but do not provide a measurement of the pain itself as experienced by the patient.