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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A systems-based investigation into vitamin D and skeletal muscle repair, regeneration, and hypertrophy
Daniel J. Owens,Adam P. Sharples,Ioanna Polydorou,Nura Alwan,Timothy F. Donovan,Jonathan Tang,William D. Fraser,Robert G. Cooper,James P. Morton,Claire E. Stewart,Graeme L. Close +10 more
TL;DR: Preliminary data are the first to characterize a role for vitamin D in human skeletal muscle regeneration and suggest that maintaining serum 25(OH)D may be beneficial for enhancing reparative processes and potentially for facilitating subsequent hypertrophy.
Journal ArticleDOI
Validation of an innovative method of shoulder range-of-motion measurement using a smartphone clinometer application
Brian C. Werner,Russell E. Holzgrefe,Justin W. Griffin,Matthew L. Lyons,Christopher T. Cosgrove,Joseph M. Hart,Stephen F. Brockmeier +6 more
TL;DR: The smartphone clinometer has excellent agreement with a goniometer-based gold standard for measurement of shoulder ROM in both healthy and symptomatic subjects, and there is good correlation among different skill levels of providers for measurements obtained using the smartphone.
Journal ArticleDOI
The reliability, precision and clinically meaningful change of walking assessments in multiple sclerosis.
TL;DR: The reliability of these outcomes is good and falls within acceptable ranges, and Precision and clinically important change estimates provide guidelines for interpreting these outcomes in clinical and research settings.
Journal ArticleDOI
Establishing normative profiles in performance analysis.
TL;DR: In this article, the authors make the implicit assumption that in presenting a performance profile of a team or an individual that a 'normative profile' has been achieved, which implies that al...
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Developing Anticipation Skills in Tennis Using On-Court Instruction: Perception versus Perception and Action.
TL;DR: In this article, on-court instruction involving either perception-action training or perception-only training was used to improve anticipation skill in novice tennis players, and a technical instruction group acted as a control.
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.