Visual analog scale vas and its corresponding visual analog pain scale, is a psychometric scale that is generally used in hospitals and clinics by doctors to conduct pain scale surveys to understand varying degrees of pain or discomfort experienced by a patient alternatively, it is also used in surveys to measure characteristics and attitude across a range of continuous values. Mcgrath,i, amir rafii and barbara buckingham eparfment of anaestkesioiogy, medical college of virginia, richmond, vu u. Mean scores for anxiety, mood and pain relief were consistent, but mean pain scores were more variable. The patient is asked to mark his pain level on the line between the two endpoints. A visual analogue scale vas is a measurement instrument that tries to.
Administration a selfreport, paperandpencil measure, the scale requires between 5. However, in a broad sense these pain ratings do bear the expected relationships to related variables, such as disability and mood, and are also. The aims were to describe the relationship between the vas and vrs. The pain vas is most often used as a unidimensional measure of pain intensity. The visual analog scale vas, developed by freyd, is a wellknown measurement tool for pain, consisting of a single 100 mm line. The use of unidimensional pain scales such as the numerical rating scale nrs, verbal rating scale vrs, or visual analogue scale vas is recommended for assessment of pain intensity pi.
A physical therapy knowledge broker project supported by. Anusha balakrishnan, bvsc, is a firstyear resident in small animal emergency and critical care medicine at university of pennsylvania school of veterinary medicine. Please indicate your pain level right now, average pain, and pain at its best and worst. The visual analogue scale vas consists of a straight line with the endpoints defining extreme limits such as no pain at all and pain as bad as it could be fig. If the raw data for visual analog scales are converted into either ranks or ordered categories, inferences regarding their reliability and validity coefficients could be handled in the same manner. Visual analogue scale vas a visual analogue scale vas is a measurement instrument that tries to measure a characteristic or attitude that is believed to range across a continuum of values and cannot easily be directly measured. The design of clinical trials to assess the pain relief pr properties of analgesic drugs often utilize subject reported visual analog scales vas or numerical rating scale. Litigation or social problems were not associated with increased pain. Publication osprey warrior 068 continentalinfantryman pdf measures of adult pain. Its simplicity, reliability, and validity, as well as its. Consideration of the vas in terms of its physical structure and the patients behaviour when confronted with the scale, casts doubt on its validity. View the article pdf and any associated supplements and figures for a period of 48 hours.
It is a measurement instrument for subjective characteristics or attitudes that cannot be directly measured. It is a continuous scale comprised of a horizontal called horizontal visual analog scale or, vertical called vertical visual analog scale usually 10 cm or 100 mm length both the gradations are used. Pain scale for plantar fasciiits the foot and ankle. Visual analog scale for pain vas pain, numeric rating scale for pain nrs pain, mcgill pain questionnaire mpq, short. The pain vas originated from continuous visual analog scales developed in the field of. Categorical scales use words as the primary communication tool and may also incorporate numbers, colors, or relative location to communicate pain. Visual analog scale an overview sciencedirect topics. A visual analogue scale, or vas, is a tool that dispenses with numbers for measuring pain. Visual analog scales vas typically ask a patient to mark a place on a scale that aligns with their level of pain. It recognizes that many patients dont experience pain in discrete units like numbers, but in a variable way that exists on a sliding scale. It is usually presented as a 100mm horizontal line on which the patients pain intensity is represented by a point between the extremes of no pain at all and worst pain imaginable. This questionnaire was administered to 400 patients who had been diagnosed with either pf or another pathology causing heel pain e. This is a handy vas scale in the style of a thermometer which can be used for symptom rating. Studies comparing numerical rating scales, verbal rating.
The visual analog scale vas is a pain rating scale 1 9 first used by hayes and patterson in 1921. The visual analogue scale or visual analog scale vas is a psychometric response scale which can be used in questionnaires. An exploration using rasch analysis article pdf available in plos one 96. Validation of the turkish version of the visual analog. The patient is asked to place a vertical mark on the scale to indicate the level of intensity of his or her pain, anxiety, depression, etc. Assesing validity and reliiability of likert and visual. For example, the amount of pain that a patient feels ranges across a continuum from none to an extreme amount of pain. Ubc department of physical therapy, physiotherapy association of bc. Please mark on the line below how much pain you have had from your neck, on average, over the past week. Reliability of the visual analog scale for measurement of. Visual analog scale for pain vas pain wiley online library. It is anchored by two verbal descriptors, one for each symptom extreme. Population for testing the scale has been validated with adults aged 1855 years. Visual analogue scales vas are 10cm lines anchored at the ends by words that define the bounds of various pain dimensions.
Visual analog survey scale a painful misnamed scale. Combining scores on likert scales and visual analog scales the preceding discussion was concerned with a singleitem ls or vas. Pain rating scales instructions subjective pain score all patients are to have a functional activity score recorded in addition to the chosen subjective score. Standard methods for analysis and reporting of vas or nrs. Clients simply rate the intensity of the sensation on a scale from 0 100, or on whatever scale has been agreed.
Patients respond to each item by marking along a 10cm visual analog scale. Is the pain visual analogue scale linear and responsive to change. Visual analog scale for pain vas pain, numeric rating scale. Assessing pain intensity with the visual analog scale. This paper presents a secondary analysis of a subsection of data collected as part of an evaluation of an intervention to improve nighttime pain.
Patients with neck pain including pain related to osteoarthritis method of use. It was created for use in hospitals where pain levels need to be assessed quickly with patients who might not understand the local language. Pdf backround visual analogue scales vas are psychometric measuring. It consists of a line, approximately 1015 cm in length, with the left side signifying no pain with a smiling face image and the right side signifying the worst pain ever with a frowning face image. It seems logical to call the vas a category scale when it is used as a measurement instrument comparable to a likert scale, with numbers replacing verbal descriptors. Summary the repeatability coefficient of the 100mm visual analogue scale in children, a measure of testretest reliability, is 12 mm when pain did not change. Reliability of the visual analog scale in children with. In children, many psychometric properties of the visual analogue scale vas are known, including the minimum clinically significant difference 10 mm on a 100mm vas. Visual analogue scale vas instruct the patient to point to the position on the line between the faces to indicate how much pain they are currently feeling. The reliability of visual analog scale vas scores has not been demonstrated in the acute setting where pain fluctuation might be greater than for chronic pain. Visual analog scale for pain vas pain, numeric rating scale for pain nrs pain. Numerical rating scales nrs use numbers to rate pain.
Visual analog scale vas is a measure of pain intensity. The validation of visual analogue scales as ratio scale. Standard methods for analysis and reporting of vas or nrs derived pain relief response scores. Use of pain rating scales, especially the visual analogue scale vas, has increased dramatically in the last decade. Doublesided print or photocopy the next 2 diagrams ensuring that the. Pdf objectives pain visual analogue scales vas are commonly used in clinical trials and are often treated as an interval level scale without. When responding to a vas item, respondents specify their level of agreement to a statement by indicating a position along a continuous line between two endpoints. Visual analog pain scale painful behavior can range from these obvious behaviors to the animal just being quiet and hiding. A visual analogue scale vas is a measurement instrument that tries to measure a characteristic or attitude that is believed to range across a continuum of values and cannot easily be directly measured.
The visual analogue scale vas is a scale used to determine the pain intensity experienced by individuals. The respondent is asked to place a line perpendicular. The vas is a straight horizontal line of fixed length, usually 100 mm. There was a very close correlation between any two feelings expressed on these visual analogue scales during both the initial and second visits. Work group spine, german trauma association dgu in 2001. Observe the patient for five minutes before scoring his or her behaviors. The visual analog scale vas is one such combination scale presentation, developed by hayes and patterson in 1921.
Definitions of each item are provided on the following page. Visual analogue scales vas and verbal rating scales vrs are widely used to assess pain. Reliable and valid measures of pain are needed to advance research initiatives on appropriate and effective use of analgesia in the emergency department ed. Please mark on the line below how much pain you have had from your worst arm, on average, over the past week. A clinical trial article pdf available january 2016 with. A descriptive study of the use of visual analogue scales. The visual analogue scale vas is commonly used as the outcome measure for such studies. Visual analogue scales were used to rate the sensation intensity. Pain scales in multiple languages british pain society. Faces pain scale visual analog scale vas 0 2 4 6 8 10 very happy, no hurt hurts just a little bit hurts a little more hurts even more hurts a whole lot hurts as much as you can imagine dont have to be crying to feel this much pain revised 1201 3. Visual analogue scale to evaluate fatigue severity vasf. Rating scales, category scales and visual analogue scales the terms rating scale, category scale and visual analogue scale are often used in the literature interchangeably. Marie westby, ronda field, maureen duggan, dolores langford, robyn laytham, steven longstaff, lauren welch, alison hoens. Woodforde and merskey 15 first reported use of the vas pain scale with the descriptor extremes no pain at all and my pain is as bad as it could possibly be in patients with a variety of conditions.
The validation of visual analogue scales as ratio scale measures for chronic and experimental pain donald d. Because pain is a subjective experience there is no gold standard criterion for validity. Pdf is the pain visual analogue scale linear and responsive to. The pain vas originated from continuous visual analog scales developed in the field of psychology to measure well. Numerical rating scale nrs and visual analogue scale vas. Score the behaviors according to the following chart. Visual analogue scales vass can be used for subjective ratings of mood, emotion, distress, or other sensations such as pain. Pdf accuracy, validity, and reliability of an electronic. Cmpssf glasgow composite measure pain scale short form. Items score range from 0 to 5, and the total score is a total of the item scores. Accuracy, validity, and reliability of an electronic visual analog scale for pain on a touch screen tablet in healthy older adults. Validation of digital visual analog scale pain scoring.