The Experts below are selected from a list of 96093 Experts worldwide ranked by ideXlab platform
Amy R. Lipson - One of the best experts on this subject based on the ideXlab platform.
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Psychometric properties of a single-item Visual Analog Scale measuring goals of care in patients with advanced cancer
Quality of Life Research, 2020Co-Authors: Sara L. Douglas, Grant Pignatello, Sumin Park, Amy R. LipsonAbstract:Purpose The purpose of this study was to examine the psychometric properties of a single-item Visual Analog Scale (VAS) to measure goals of care in patients with advanced cancer. Methods Data were obtained from 378 patients with diagnoses of advanced lung, gastrointestinal, or pancreatic cancer. Goal of care was measured at baseline and every 3 months until patient death or completion of the 15-month study period. A single-item VAS ranging from 0 (quality of life is all that matters) to 100 (length of life is all that matters) was used to measure patients’ goals of care for all study subjects; a subsample of subjects also completed the Quality of Life-Length of Life Scale which asked patients to select categories of preferences. Test–retest reliability (intra-class correlation) and construct validity (known-groups, convergent, divergent) were evaluated. Results At 9 and 12 months, the test–retest reliability for patients with stable symptoms ( n = 107) was established with the ICC_(1,3) = 0.81, p
Ee Guan Tay - One of the best experts on this subject based on the ideXlab platform.
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the discriminative power of the euroqol Visual Analog Scale is sensitive to survey language in singapore
Health and Quality of Life Outcomes, 2012Co-Authors: Nan Luo, Shengqun Cang, Huimin Joanne Quah, Choonhow How, Ee Guan TayAbstract:Existing evidence for validity of the Visual Analog Scale of the EQ-5D-3L questionnaire (EQ-VAS) is weak in Chinese-speaking respondents in Singapore. We therefore investigated the validity of the Chinese (Singapore) version of EQ-VAS in patients with diabetes. In a cross-sectional survey, patients with type 2 diabetes seen in a primary care facility completed an identical Chinese or English questionnaire containing the EQ-5D-3L and questions assessing other health and disease-related characteristics. Convergent and known-groups validity of the EQ-VAS was examined for Chinese- and English-speaking respondents separately. The EQ-VAS was correlated with the EQ-5D-3L health index and a 5-point Likert-type Scale for assessing global health in both Chinese-speaking (N = 335) and English-speaking respondents (N = 298), suggesting convergent validity. The mean EQ-VAS scores differed between English-speaking patients with differing duration of diabetes (< 10 years versus ≥ 10 years), comorbidity status (absence versus presence), and complications of diabetes (absence versus presence), providing evidence for known-groups validity. However, the EQ-VAS scores for Chinese-speaking respondents known to differ in these characteristics were similar, even among subgroups of relatively younger patients or those with formal school education. Chinese- and English-speaking Singaporeans respond differently to the EQ-VAS. The Chinese version of EQ-VAS appears less sensitive than its English version for measuring global health in patient populations in Singapore.
Gideon Koren - One of the best experts on this subject based on the ideXlab platform.
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reliability and validity of observer ratings of pain using the Visual Analog Scale vas in infants undergoing immunization injections
Pain, 2009Co-Authors: Anna Taddio, Lisa Obrien, Moshe Ipp, Derek Stephens, Morton Goldbach, Gideon KorenAbstract:Abstract We tested the reliability and validity of observer-rated pain in infants undergoing immunization using the Visual Analog Scale (VAS). Pain was assessed in real time and later, from videotapes, in 120 1-year-old infants participating in a double-blind randomized controlled trial of amethocaine vs. placebo. Altogether, 2 (1 physician, 1 non-physician) of 4 raters [2 physicians, 2 non-physicians (nurse and graduate student)] independently assessed baseline and vaccine injection pain using a 100 mm unmarked VAS line. Intra- and inter-rater reliability, assessed using the intra-class correlation coefficient (ICC), ranged from 0.69 to 0.91 and 0.55 to 0.97, respectively. Bland–Altman plots demonstrated no evidence of bias between real time and video assessments. When scores were dichotomized into 2 groups (no pain and pain) using a cut-off of ⩾30 mm, intra-rater reliability ranged from 0.35 to 0.92. The percent of scores deviating by >20 mm was 4.5–14.29%. Criterion validity was demonstrated by correlations between the VAS and Modified Behavioural Pain Scale, a validated observational measure; (ρ: 0.81–0.94). Injection scores were lower in the amethocaine group, when comparing difference (baseline-injection) or dichotomized scores; significance (p
Peter Weibl - One of the best experts on this subject based on the ideXlab platform.
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a prospective evaluation of pain associated with stone passage stents and stent removal using a Visual Analog Scale
Urology, 2013Co-Authors: Franklin E Kuehhas, Arkadus Miernik, Varun Sharma, Sabina Sevcenco, Elchin Javadli, Ralf Herwig, Tibor Szarvas, Martin Schoenthaler, Georg Schatzl, Peter WeiblAbstract:Objective To investigate the perception of colicky pain due to ureteral stones and double- J (DJ)-associated discomfort and to evaluate the role of clinical parameters that might influence the perception of pain. Materials and Methods From November 2011 to May 2012, 124 consecutive patients with colicky pain due to ureteral stones and ureteroscopic stone extraction underwent DJ stent placement. A Visual Analog Scale (VAS) was used to assess the pain at ureteral colic, during indwelling DJ stent, and at DJ stent removal. The association of clinical data with pain scores was also analyzed. Results Pain perception at the time of colic did not vary according to sex ( P = .804), age ( P = .674), or DJ stent length ( P = .389). Stone size ( P = .001). Patients with recurrent stone formation had significantly less pain at the time of colic ( P = .004), and DJ stent removal ( P = .004) than those with the first instance of stone formation. The clinical experience at cystoscopic DJ stent removal influenced pain perception ( P Conclusion Using a VAS for the evaluation of pain perception is a valid method for the objectification of subjective discomfort. The VAS is an easy to administer Scale and provides accurate information on the patients' status. Additional studies with larger cohorts focusing on pain perception using the VAS and other validated questionnaires are recommended to produce more consistent data.
Stephen Joel Coons - One of the best experts on this subject based on the ideXlab platform.
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Testing the measurement equivalence of paper and touch-screen versions of the EQ-5D Visual Analog Scale (EQ VAS).
Quality of Life Research, 2008Co-Authors: Sulabha Ramachandran, J. Jason Lundy, Stephen Joel CoonsAbstract:Objectives This study examined the measurement equivalence of the original paper-based vertical format of the EQ-5D Visual Analog Scale (EQ VAS) with a touch-screen computer-based horizontal format.
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Comparison of Finnish and U.S.-based Visual Analog Scale valuations of the EQ-5D measure.
Medical Decision Making, 2000Co-Authors: Jeffrey A. Johnson, Arto Ohinmaa, Bhisma Murti, Harri Sintonen, Stephen Joel CoonsAbstract:The EQ-5D is a multiattribute health status measure that can be used to derive preference-based index scores for health-related quality-of-life (HRQOL) assessment. Valuations for EQ-5D health states using different techniques have been obtained in a number of countries. It is not clear how valuations from different countries compare. Using an ordinary least-squares regression, Visual Analog Scale valuations for EQ-5D health states obtained in postal surveys in Finland and the United States were compared. The regression model estimates indicated that Finnish and U.S. respondents did provide different preference valuations for different levels of health. However, the country-specific differences were not large and depended on the dimension and the level of problem on that dimension. Differences in health-state valuations are unlikely to have important implications when using the EQ-5D in international studies. Key words: EQ-5D; valuations; health-related quality of life; Visual Analog Scale; health status. ...
