Journal ArticleDOI
Statistical Methods For Assessing Measurement Error (Reliability) in Variables Relevant to Sports Medicine
Greg Atkinson,Alan M. Nevill +1 more
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TLDR
It is recommended that sports clinicians and researchers should cite and interpret a number of statistical methods for assessing reliability and encourage the inclusion of the LOA method, especially the exploration of heteroscedasticity that is inherent in this analysis.Abstract:
Minimal measurement error (reliability) during the collection of interval- and ratio-type data is critically important to sports medicine research. The main components of measurement error are systematic bias (e.g. general learning or fatigue effects on the tests) and random error due to biological or mechanical variation. Both error components should be meaningfully quantified for the sports physician to relate the described error to judgements regarding ‘analytical goals’ (the requirements of the measurement tool for effective practical use) rather than the statistical significance of any reliability indicators.read more
Citations
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Reliability of Assessing Indices of Isokinetic Leg Strength in Pubertal Soccer Players
TL;DR: Using 95% limits of agreement (LOA), this study examined the reproducibility of indices of isokinetic leg strength in pubertal soccer players and found that H:Q ratios calculated at high concentric velocities and during eccentric actions appeared narrow enough to be of practical use.
Can we use the Jackson and Pollock equations to predict body density/fat of obese individuals in the 21st century?
TL;DR: Compared to the original quadratic model proposed by JP, the alternative exponential power-function model is theoretically and empirically more accurate when predicting body fat of obese subjects (sums of skinfolds >120mm) and predicts body fat to rise monotonically, with increasing skin-fold thicknesses.
Journal ArticleDOI
Measurement Error in Functional Balance and Mobility Tests for People With Stroke: What Are the Sources of Error and What Is the Best Way to Minimize Error?:
TL;DR: The tests using interval data showed less error than ratio-data tests and may be preferable measurement tools, and the tests using interrater testing had the least error.
Journal ArticleDOI
Determination of “Fatmax” with 1 h cycling protocols of constant load
TL;DR: It is impossible to define one theoretical optimal intensity for fat oxidation that is true in all individuals, and it is thus mandatory to perform an individual assessment with indirect calorimetry.
Journal ArticleDOI
The OARSI core set of performance-based measures for knee osteoarthritis is reliable but not valid and responsive.
J.J. Tolk,Rob P.A. Janssen,C. (Sanna) A.C. Prinsen,D.A.J.M. Latijnhouwers,M. C. van der Steen,S.M.A. Bierma-Zeinstra,Max Reijman +6 more
TL;DR: The three performance-based tests had good reliability, but poor construct validity and responsiveness in the assessment of function for the domains sit-to-stand movement, walking short distances and stair negotiation do not justify their use for clinical practice.
References
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Journal ArticleDOI
Statistical methods for assessing agreement between two methods of clinical measurement.
TL;DR: An alternative approach, based on graphical techniques and simple calculations, is described, together with the relation between this analysis and the assessment of repeatability.
Book
Practical statistics for medical research
TL;DR: Practical Statistics for Medical Research is a problem-based text for medical researchers, medical students, and others in the medical arena who need to use statistics but have no specialized mathematics background.
Journal ArticleDOI
Statistical methods for assessing agreement between two methods of clinical measurement
TL;DR: In this article, an alternative approach, based on graphical techniques and simple calculations, is described, together with the relation between this analysis and the assessment of repeatability, which is often used in clinical comparison of a new measurement technique with an established one.
Journal ArticleDOI
A concordance correlation coefficient to evaluate reproducibility.
TL;DR: A new reproducibility index is developed and studied that is simple to use and possesses desirable properties and the statistical properties of this estimate can be satisfactorily evaluated using an inverse hyperbolic tangent transformation.