The Experts below are selected from a list of 91233 Experts worldwide ranked by ideXlab platform
G S Makin - One of the best experts on this subject based on the ideXlab platform.
-
how successful is varicose vein surgery a patient outcome study following varicose vein surgery using the sf 36 Health Assessment Questionnaire
European Journal of Vascular and Endovascular Surgery, 1995Co-Authors: D M Baker, N B Turnbull, J C G Pearson, G S MakinAbstract:Objective: Assessment of outcome after varicose vein surgery. Design: Prospective study using the Health Assessment Questionnaire (SF36) which considers different aspects of overall Health. Setting: University Hospital and Community. Materials: 150 patients undergoing varicose vein surgery. Chief outcome measures: SF36 Questionnaires were sent pre-operatively and at 1 and 6 months post surgery. Main results: Eighty-nine (59%) patients answered all three Questionnaires. Pre-operatively their overall Health was similar to that of the general population. The “cost” to the patient of the operation was demonstrated by an increased pain and reduced role function at 1 month post-operation (p Conclusions: The general good Health of varicose vein patients may justify the low priority given to their treatment, but the improvement in symptoms and general Health that relatively simple surgery provides should ensure its continued provision as a Health care service.
D M Baker - One of the best experts on this subject based on the ideXlab platform.
-
how successful is varicose vein surgery a patient outcome study following varicose vein surgery using the sf 36 Health Assessment Questionnaire
European Journal of Vascular and Endovascular Surgery, 1995Co-Authors: D M Baker, N B Turnbull, J C G Pearson, G S MakinAbstract:Objective: Assessment of outcome after varicose vein surgery. Design: Prospective study using the Health Assessment Questionnaire (SF36) which considers different aspects of overall Health. Setting: University Hospital and Community. Materials: 150 patients undergoing varicose vein surgery. Chief outcome measures: SF36 Questionnaires were sent pre-operatively and at 1 and 6 months post surgery. Main results: Eighty-nine (59%) patients answered all three Questionnaires. Pre-operatively their overall Health was similar to that of the general population. The “cost” to the patient of the operation was demonstrated by an increased pain and reduced role function at 1 month post-operation (p Conclusions: The general good Health of varicose vein patients may justify the low priority given to their treatment, but the improvement in symptoms and general Health that relatively simple surgery provides should ensure its continued provision as a Health care service.
Mart A F J Van De Laar - One of the best experts on this subject based on the ideXlab platform.
-
development and evaluation of a crosswalk between the sf 36 physical functioning scale and Health Assessment Questionnaire disability index in rheumatoid arthritis
Health and Quality of Life Outcomes, 2013Co-Authors: Peter Ten M Klooster, Erik Taal, Cees A. W. Glas, Piet L. C. M. Van Riel, Martijn Oude A H Voshaar, Barbara Gandek, Matthias Rose, Jakob B Bjorner, Mart A F J Van De LaarAbstract:Background The SF-36 physical functioning scale (PF-10) and the Health Assessment Questionnaire disability index (HAQ-DI) are the most frequently used instruments for measuring self-reported physical function in rheumatoid arthritis (RA). The objective of this study was to develop a crosswalk between scores on the PF-10 and HAQ-DI in RA.
-
Measurement bias in different versions of the Dutch Health Assessment Questionnaire Disability Index.
Annals of the rheumatic diseases, 2013Co-Authors: Martijn A. H. Oude Voshaar, Peter M. Ten Klooster, Harald E. Vonkeman, Wietske Kievit, Piet L. C. M. Van Riel, Mart A F J Van De LaarAbstract:The Health Assessment Questionnaire (HAQ) Disability Index is the most frequently used and validated measure of physical function for patients with rheumatoid arthritis (RA).1 Various translated versions of this Questionnaire have been used in clinical research in the Netherlands. In 2007, a standardised translation, the Dutch consensus HAQ, was introduced and a letter detailing its development appeared in this journal.2 The Dutch DREAM registry,3 a multicentre observational cohort study that monitors RA patients undergoing different treatment regimens, soon adopted the consensus HAQ.
-
Crosscultural measurement equivalence of the Health Assessment Questionnaire II.
Arthritis care & research, 2013Co-Authors: Martijn A. H. Oude Voshaar, Peter M. Ten Klooster, Erik Taal, Cees A. W. Glas, Frederick Wolfe, Mart A F J Van De LaarAbstract:OBJECTIVE: To evaluate the cross-cultural measurement equivalence of the US and Dutch Health Assessment Questionnaire II (HAQ-II) in rheumatoid arthritis (RA). METHODS: Item response theory (IRT) analyses were performed on US (n=18747) and Dutch (n=1022) HAQ-II data to evaluate the equivalence of cross-cultural item performance. Observed inconsistencies were modeled by assigning country-specific item parameters to biased items. The impact of cross-cultural item bias on the comparability of the Dutch and US total scores was analyzed by evaluating the agreement between physical function levels estimated from an IRT model with country specific-item parameters for biased items and the physical function levels estimated from the original model that does not account for cultural bias. RESULTS: Two items showed significant cross-cultural bias. However, the agreement in physical function estimates between the respecified and original model was very high with ICC >0.99 and the Bland–Altman limits of agreement ranging from -0.08 to 0.07 on a latent scale with a mean of 0 and standard deviation 1. CONCLUSIONS: This study suggests that the Dutch and US HAQ-II produce total scores that can be interpreted interchangeably across countries in RA studies, despite some minor bias at the item level.
-
Application of the Health Assessment Questionnaire disability index to various rheumatic diseases
Quality of life research : an international journal of quality of life aspects of treatment care and rehabilitation, 2010Co-Authors: Maaike M. Van Groen, Peter M. Ten Klooster, Erik Taal, Mart A F J Van De Laar, Cees A. W. GlasAbstract:Purpose To investigate whether the Stanford Health Assessment Questionnaire Disability Index (HAQ-DI) can serve as a generic instrument for measuring disability across different rheumatic diseases and to propose a scoring method based on item response theory (IRT) modeling to support this goal.
-
Rasch analysis of the Dutch Health Assessment Questionnaire disability index and the Health Assessment Questionnaire II in patients with rheumatoid arthritis.
Arthritis and rheumatism, 2008Co-Authors: Peter M. Ten Klooster, Erik Taal, Mart A F J Van De LaarAbstract:Objective: The Health Assessment Questionnaire (HAQ) disability index (DI) is the most common self-reported measure of physical disability in rheumatoid arthritis (RA). Recently, the HAQ-II was developed in the US as a short, valid, and reliable alternative using Rasch analysis. Our objective was to compare the scaling properties of the HAQ DI and HAQ-II in Dutch patients with RA. - Methods: We used data from 472 patients with confirmed RA. Internal construct validity of the HAQ versions was assessed using Rasch analysis. Additionally, external construct validity was assessed by examining correlates with other outcome measures. - Results: The HAQ DI had a large floor effect, with 9.5% of the patients indicating no disability compared with 4.3% for the HAQ-II. Both versions were unidimensional and adequately fit the Rasch model, containing only 1 nonfitting item. Additionally, 2 HAQ-II items demonstrated overfit and a high residual correlation, suggesting overlap or redundancy in item content. The HAQ-II demonstrated better item separation, indicating that it covered a wider range of physical function. Item difficulty estimates were reasonably well spread for the HAQ-II, whereas the HAQ DI items tended to cluster around similar difficulty levels. Both scales contained several items with differential item functioning by sex, age, or disease duration. Both scales demonstrated the expected pattern of correlations with other outcome measures.
James F. Fries - One of the best experts on this subject based on the ideXlab platform.
-
Percentile benchmarks in patients with rheumatoid arthritis: Health Assessment Questionnaire as a quality indicator (QI).
Arthritis research & therapy, 2004Co-Authors: Eswar Krishnan, Peter Tugwell, James F. FriesAbstract:Physicians are in need of a simple objective, standardized tool to compare their patients with rheumatoid arthritis, as a group and individually, with national standards. The Disability Index of the Health Assessment Questionnaire (HAQ-DI) is a simple, robust tool that can fulfill these needs. However, use of this tool as a quality indicator (QI) is hampered by the unavailability of national reference values or benchmarks based on large, multicentric, heterogenous longitudinal patient cohorts. We utilized the 20-year longitudinal prospective data from 11 data banks of Arthritis Rheumatism and Aging Medical Information to calculate reference values for HAQ-DI. Overall, 6436 patients with rheumatoid arthritis were longitudinally followed for 32,324 person-years over the 20 years from 1981 to 2000. There were 64,647 HAQ-DI measurements, with an average of 19 measurements per person. Overall, 75% of patients were women and 89% were Caucasian; the median baseline age was 58.4 years and the median baseline HAQ-DI was 1.13. Few patients were treated with biologics. The HAQ-DI values had a Gaussian distribution except for the approximately 10% of observations showing no disability. Percentile benchmarks allow disability outcomes to be compared and contrasted between different patient populations. Reference values for the HAQ-DI, presented here numerically and graphically, can be used in clinical practice as a QI measure to track functional disability outcomes and to measure response to therapy, and by arthritis patients in self-management programs.
-
The Stanford Health Assessment Questionnaire: dimensions and practical applications.
Health and quality of life outcomes, 2003Co-Authors: Bonnie Bruce, James F. FriesAbstract:The ability to effectively measure Health-related quality-of-life longitudinally is central to describing the impacts of disease, treatment, or other insults, including normal aging, upon the patient. Over the last two decades, Assessment of patient Health status has undergone a dramatic paradigm shift, evolving from a predominant reliance on biochemical and physical measurements, such as erythrocyte sedimentation rate, lipid profiles, or radiographs, to an emphasis upon Health outcomes based on the patient's personal appreciation of their illness. The Health Assessment Questionnaire (HAQ), published in 1980, was among the first instruments based on generic, patient-centered dimensions. The HAQ was designed to represent a model of patient-oriented outcome Assessment and has played a major role in many diverse areas such as prediction of successful aging, inversion of the therapeutic pyramid in rheumatoid arthritis (RA), quantification of NSAID gastropathy, development of risk factor models for osteoarthrosis, and examination of mortality risks in RA. Evidenced by its use over the past two decades in diverse settings, the HAQ has established itself as a valuable, effective, and sensitive tool for measurement of Health status. It is available in more than 60 languages and is supported by a bibliography of more than 500 references. It has increased the credibility and use of validated self-report measurement techniques as a quantifiable set of hard data endpoints and has contributed to a new appreciation of outcome Assessment. In this article, information regarding the HAQ's development, content, dissemination and reference sources for its uses, translations, and validations are provided.
-
the stanford Health Assessment Questionnaire a review of its history issues progress and documentation
The Journal of Rheumatology, 2003Co-Authors: Bonnie Bruce, James F. FriesAbstract:Over the last 2 decades, Assessment of patient Health status has undergone a dramatic paradigm shift, evolving from a predominant reliance on biochemical and physical measurements to an emphasis upon Health outcomes based on the patient9s personal appreciation of their illness. The Health Assessment Questionnaire (HAQ), published in 1980, was among the first instruments based on patient centered dimensions. The HAQ was designed to represent a model of patient oriented outcome Assessment and has played a major role in diverse areas such as prediction of successful aging, inversion of the therapeutic pyramid in rheumatoid arthritis (RA), quantification of nonsteroidal antiinflammatory drug gastropathy, development of risk factor models for osteoarthrosis, and examination of mortality risks in RA. The HAQ has established itself as a valuable, effective, and sensitive tool for measurement of Health status. It has increased the credibility and use of validated self-report measurement techniques as a quantifiable set of hard data endpoints and has contributed to a new appreciation of outcome Assessment. We review the development, content, and dissemination of the HAQ and provide reference sources for its uses, translations, and validations. We discuss contemporary issues regarding outcome Assessment instruments relative to the HAQ9s identity and utility. These include: (1) the issue of labeling instruments as generic versus disease-specific; (2) floor and ceiling effects in scales such as "disability"; (3) distances between values on scales; and (4) the continuing introduction of new measurement instruments and their potential effects.
-
The Health Assessment Questionnaire 1992. Status and review
Arthritis care and research : the official journal of the Arthritis Health Professions Association, 1992Co-Authors: Dena R. Ramey, Jean-pierre Raynauld, James F. FriesAbstract:Over 100 papers describing and utilizing the Stanford Health Assessment Questionnaire (HAQ) have been published since 1980. A brief overview of the HAQ is presented along with a guide to the accumulated literature. The topics covered include: studies using the disability, pain, economic, and drug side effect dimensions of the HAQ; reliability and validity studies; applications to various rheumatic diseases; language adaptations; modifications and derivative scales; studies correlating the HAQ with sociodemographic, Health status, laboratory, and physical measures; and randomized controlled trials and observational studies using the HAQ. A few comments regarding future directions for research are also presented.
N B Turnbull - One of the best experts on this subject based on the ideXlab platform.
-
how successful is varicose vein surgery a patient outcome study following varicose vein surgery using the sf 36 Health Assessment Questionnaire
European Journal of Vascular and Endovascular Surgery, 1995Co-Authors: D M Baker, N B Turnbull, J C G Pearson, G S MakinAbstract:Objective: Assessment of outcome after varicose vein surgery. Design: Prospective study using the Health Assessment Questionnaire (SF36) which considers different aspects of overall Health. Setting: University Hospital and Community. Materials: 150 patients undergoing varicose vein surgery. Chief outcome measures: SF36 Questionnaires were sent pre-operatively and at 1 and 6 months post surgery. Main results: Eighty-nine (59%) patients answered all three Questionnaires. Pre-operatively their overall Health was similar to that of the general population. The “cost” to the patient of the operation was demonstrated by an increased pain and reduced role function at 1 month post-operation (p Conclusions: The general good Health of varicose vein patients may justify the low priority given to their treatment, but the improvement in symptoms and general Health that relatively simple surgery provides should ensure its continued provision as a Health care service.
