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Validation for the reduced Western Ontario and McMaster Universities Osteoarthritis Index function scale
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ABSTRACT
Purpose. To assess the criterion validity, repeatability, and the missing value protocol of the reduced Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC) function scale ('reduced scale').
Methods. Three separate studies were performed: a cross-over study to compare the full- and reduced-scale scores in 66 UK patients for validity, a test-retest study for repeatability in 103 Australian patients, and a study for the missing value protocol of the redu...
Related newspaper, magazine, and journal articles from HighBeam Research
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Are values missing randomly in survey research?
Educational Research Quarterly
; Many missing data studies have simulated data, randomly deleted values, and investigated which method of handling the missing values would most closely approximate the original data. Regression procedures have emerged as the most recommended methods. If the values are missing randomly, these
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An experimental determination of the best missing-value recovery method in assessing physical activity using pedometers. (Measurement).
Research Quarterly for Exercise and Sport
; Tracking the number of steps a person walked using pedometers has become one of the most commonly used practical measures in assessing physical activity. The purpose of this study was to determine empirically the most effective method to recover the missing values in a step-count data set. A total
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Comparative statistical software review: tabulations and musings from your editor's biased perspective.(STATISTICAL SOFTWARE)
Scientific Computing
; What follows is a long exercise in patient digging. I had done a short review like this many years ago and our editor-in-chief thought that it might be a good idea to bring it up to date. I now have the master template that allow updates on a more timely basis as well as extension into other areas
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Casino operator drops bid for rival.
Financial News
; Stanley Leisure, the casino operator, said last Friday it had decided not to go ahead with an offer for London Clubs, its debt-laden competitor. The company made an indicative approach to London Clubs before Christmas at 25p a share. Stanley said it had made efforts to establish acceptable terms
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Managing missing data.(Data Systems)
Software World
; Today's commercially competitive world where the customer is king relies on data, and huge amounts of it. Retailers, financial institutions, leisure providers and many other types of company collect, process and then analyse vast amounts of lifestyle, demographic, and transaction data, to
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Frequently asked questions.(Software World Intelligence)
Software World
; What is a missing value? A missing value, also known as a 'hole' or a 'gap' is an empty field in a database. In database terminology missing values are labelled 'null' values. Typically what percentage of values are missing from a lifestyle database. It is difficult to generalise but as much as
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Designed experiments with missing or discordant values
Journal of Quality Technology
; THOSE who have carried out designed experiments have occasionally encountered a missing value or a value that was clearly discordant. How does one carry out a proper analysis in such a situation? When a value is missing from a balanced experimental design, such as a factorial design, it is
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ATTRITION IN GERIATRIC RESEARCH: HOW IMPORTANT IS IT AND HOW SHOULD IT BE DEALT WITH ?
The Journal of Nutrition, Health & Aging
; Abstract: Attrition, defined as a total loss to follow-up of participants, is a potential major bias in clinical trials. Participants can be lost for many reasons (death, illness, worsened health, refusal, withdrawal, lost to follow up). Attrition may be higher in older populations, so geriatric
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Classification Trees With Unbiased Multiway Splits.(Statistical Data Included)
Journal of the American Statistical Association
; ... then projected onto the largest discriminant coordinate. This maps each categorical variable into a numerical one. After all categorical ... Statistics, 29, 119-127. Kohonen, T. (1995), Self-Organizing Maps, Heidelberg: Springer-Verlag. Kooperberg, C., Bose, S., and Stone ...
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Defining null values in Microsoft Access.(SOFTWARE INTELLIGENCE)
Software World
; A Null represents an unknown or a missing value. It is important to understand that a null value does not mean a zero of a text string of one or more blank spaces. * Zero (0) can have many different meanings. A zero can represent the balance of your bank account, the amount of a product in stock or
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