To evaluate different western ontario and mcmaster universities osteoarthritis index womac pain thresholds as eligibility criteria for a knee osteoarthritis oa trial and their effect on number of subjects recruited. Higher scores represent worse pain, stiffness, and functional limitations. Hip disability and osteoarthritis outcome score womac. Pdf validation of the shortform womac function scale for the. This has important implications when considering power studies for smaller studies, and the impact of questionnaire choice on compliance and duplication of data, as well as data completion. Reliability the extent to which a scale is free from random error was evaluated in. Download pdf, 48kb the auscan index is a diseasespecific, tridimensional selfadministered questionnaire, for assessing health status and health outcomes in. Looking for online definition of womac or what womac stands for. The womac measures five items for pain score range 020, two for stiffness score range 0 8, and 17 for functional limitation.
The knee injury and osteoarthritis outcome score koos is a questionnaire designed to assess short and. The use and reporting of womac for the assessment of. Western ontario and mcmaster universities osteoarthritis index. Validation studies reliability, validity, responsiveness orthopaedic validation study. Also, womac pain score was inversely correlated p 0. Pdf purpose the koos questionnaire is used to assess the. The free information and calculation service, designed for orthopaedic surgeons, physicians, physical therapists, osteopaths, chiropractors and patients. Womac physical function, but not womac stiffness and pain subscales, was weakly associated with radiological oa severity p 0.
A retrospective cohort consisting of 2589 patients undergoing a primary tka were identified from an established arthroplasty database. Roos em, roos hp, lohmander ls, ekdahl c, beynnon bd. The reduced womac function scale provides an alternative which will. The proportion of trials, for which assumptions had to be made in order to reach a conclusion regarding the type of scale and the score range used, was calculated. Western ontario mcmaster university osteoarthritis index rheumatology an arthritic pain scoring system ranging from 0no paindisability to 100most severe paindisability. Womac score definition of womac score by medical dictionary.
The western ontario and mcmaster universities osteoarthritis index womac is a widely used, proprietary set of standardized questionnaires used by health professionals to evaluate the condition of patients with osteoarthritis of the knee and hip, including pain, stiffness, and physical functioning of the joints. Patient relevant, diseasespecific, patient selfcompleted, flexible delivery, multiple language forms. Pdf determination of normal koos and womac values in a. The reduced womac function scale provides an alternative which will limit the number of missing values, and hence the number of invalid womac scores. The measure was developed to evaluate clinically important, patientrelevant changes in health status resulting from treatment interventions. We expect that the translated and adapted version should suit other arab populations because of their similar language and culture. The expected value for the koos and womac scores in a healthy population without any knee ailments were determined. The womac pain scale was primarily a measure of pain during physical. Womac into arabic and to validate the arabic version of the index for tunisian patients with knee oa.
Salaffi et al, 2005 85, italy, italian, hipknee oa, 244, 59, 68, vas. We adapted the womac for the italian language and tested its metric properties in 304 patients with symptomatic oa of the knee. Information and translations of womac in the most comprehensive dictionary definitions resource on. The scores for each subscale are summed up, with a possible score range of 020 for pain, 08 for stiffness, and 068 for physical function. There are different clinical instruments to quantify the health status of patients with knee osteoarthritis and one example is the womac score that has been translated and adapted into different languages. To assess validity and reliability of the western ontario and mcmaster universities womac osteoarthritis oa index and lequesne algofunctional index in turkish patients with hip or knee oa and to compare the results of the instruments for these two particular sites of involvement. The western ontario and mcmaster universities womac osteoarthritis oa index is a tested questionnaire to assess symptoms and physical functional disability in patients with oa of the knee and the hip. Dimensions have been added to the womac to create the hoos, as was done with the koos.
We screened subjects with knee pain using the likert version of the womac and scored all subjects based on the severity of pain with each of the 5. However, there is relatively little evidence to support the use of the visual analogue scale vas version of the scale. For each situation, please enter the amount of pain you have experienced in the past 48 hours. The current womac survey is comprised of 24 items divided into three subscales.
Economic evaluation typically is conducted using health state utilities to estimate treatment benefits. Validation of a proposed womac short form for patients. Does parallel item content on womacs pain and function. Mcmaster osteoarthritis index womac please circle the. The hoos dimension activity of daily living is equivalent to that of.
Measurement properties of the western ontario and mcmaster. Patients have to cope with pain, swelling and disability, due to which the quality of life suffers to a large extent. The womac index is a diseasespecific, tridimensional selfadministered questionnaire, for assessing health status and health outcomes in osteoarthritis of the knee andor hip. Pain was measured using a variety of scales, with womac pain scores. However, such outcomes are often missing from studies of clinical effectiveness. It can be selfadministered and was developed at western ontario and mcmaster universities in 1982. The subscale scores can vary, with pain ranging from 0 to 20 points. Womac is listed in the worlds largest and most authoritative dictionary database of abbreviations and acronyms the free dictionary. The following questions concern the amount of pain you are currently experiencing in your knees. Patients are asked a range of questions about their ability to carry out daily activities such. Validity, reliability, and comparison of the womac. The womac has also been used to assess back pain, rheumatoid arthritis, juvenile.
The womac measures five items for pain, two for stiffness, and 17 for functional limitation. The womac index is a diseasespecific, tridimensional self administered questionnaire, for assessing health status and health outcomes in osteoarthritis of the knee andor hip. The western ontario and mcmaster universities osteoarthritis index womac is a widely used. Although the western ontario and mcmaster university osteoarthritis index womac is considered the leading outcome measure for patients with osteoarthritis of the lower extremity, recent work has challenged its factorial validity and the physical function subscales ability to detect valid change when pain and function display different profiles of change. Pain 5 items, stiffness 2 items, and physical function 17 items. A total womac score can also be produced and is commonly transformed to a 0100 scale for ease of interpretation and comparison with other studies. Scoresrange from 0 least pain to 20 highest pain for pain, 0 least stiffness to 8 greatest stiffness for stiffness, 0 best function to 68 worst function for function, and 0 best health to 96 worst health for the total score. Womac scores can thus be calculated from the hoos questionnaire. Womac is used in assessing pain, stiffness, and function in patients with oa of the hip or knee.
Development of the italian version of the knee injury and osteoarthritis outcome score for patients with knee injuries. Usually a sum of the scores for all three subscales gives a total womac score, however there are other methods that have been used to combine scores. Pdf validation of the shortform womac function scale. This study aims to bridge that gap by providing appropriate methods to link values from the western ontario and mcmaster universities osteoarthritis index womac to the eq5d utility instrument. Very high correlations were also obtained between womac scores and lequesne oa algofunctional index. Pdf this study validates the shortform womac function scale for assessment of conservative. The western ontario and mcmaster universities osteoarthritis index womac has been a widely used patient reported outcome in oa. The womac has also been used to assess back pain, rheumatoid arthritis, juvenile rheumatoid arthritis, systemic lupus erythematosus, and fibromyalgia. Knee injury and osteoarthritis outcome score koosdevelopment of a selfadministered outcome measure. The index is selfadministered and assesses the three dimensions of pain, disability and joint stiffness in knee and hip osteoarthritis using a.
The following is the table of contents from the womac 3. An extension of the western ontario and mcmaster universities osteoarthritis index. Western ontario and mcmaster universities osteoarthritis. Epidemiology of hip and knee pain in a community based sample of italian persons aged 65 and older. The hoos is a selfreport questionnaire designed to further develop the womac. I have tried to claculate the composite score from the three subscales.
Developed over 20 years ago, womac has been revised multiple times to its most current version, 3. Materials and methods the scale the womac oaindex9 is a selfadministered composite. Reliability and validity of the western ontario and. Hip disability and osteoarthritis outcome score hoos validity and. If the scores are normally distributed, you can use the ttest 2 groups or anova more than 2 groups. It is used for people with hip disability, with or without hip osteoarthritis oa.
We aimed to explore the internal validity and responsiveness of this vas version of the womac. Western ontario and mcmaster university osteoarthritis index. Using womac index scores and personal characteristics to. Patient demographics, western ontario and mcmaster universities osteoarthritis index womac, and short form sf 12 scores were collected preoperatively and 1 year postoperatively. A score derived from a questionnaire in which the patient answers questions regarding rheumatic symptoms, stiffness, pain and how it affects the ability to function.
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