Journal ArticleDOI
Sample size and optimal designs for reliability studies
TLDR
A functional approximation to earlier exact results is shown to have excellent agreement with the exact results and one can use it easily without intensive numerical computation.Abstract:
A method is developed to calculate the required number of subjects k in a reliability study, where reliability is measured using the intraclass correlation rho. The method is based on a functional approximation to earlier exact results. The approximation is shown to have excellent agreement with the exact results and one can use it easily without intensive numerical computation. Optimal design configurations are also discussed; for reliability values of about 40 per cent or higher, use of two or three observations per subject will minimize the total number of observations required.read more
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Journal ArticleDOI
Number of strides required for reliable measurements of pace, rhythm and variability parameters of gait during normal and dual task walking in older individuals
John H. Hollman,Katherine B. Childs,Megan L. McNeil,Amy C. Mueller,Christopher M. Quilter,James W. Youdas +5 more
TL;DR: The purpose of this study was to examine test-retest reliability of three gait parameters representing pace, rhythm and variability in healthy older persons during normal and dual task walking and to determine the number of strides necessary to measure the parameters reliably.
Journal ArticleDOI
Effect of rater training on reliability and accuracy of mini-CEX scores: a randomized, controlled trial.
TL;DR: Rater training did not improve interrater reliability or accuracy of mini-CEX scores and rater confidence improved for the entire cohort.
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Measuring hindfoot alignment radiographically: the long axial view is more reliable than the hindfoot alignment view
Mikel L. Reilingh,Lijkele Beimers,Gabriëlle J. M. Tuijthof,Sjoerd A. S. Stufkens,Mario Maas,C. Niek van Dijk +5 more
TL;DR: The long axial view is more reliable than the hindfoot alignment view or the angular measurement of hind foot alignment, although intra-observer reliability is good/excellent for both methods, only the longAxial view leads to good interob server reliability.
Journal ArticleDOI
Magnetic resonance imaging of articular cartilage
Michael P. Recht,Vladimir Bobic,Deborah Burstein,David G. Disler,Garry E. Gold,Martha L. Gray,Josef Kramer,Philipp Lang,Thomas R. McCauley,Carl S. Winalski +9 more
TL;DR: In this paper, the authors review the current state of the art of magnetic resonance imaging of articular cartilage and cartilage repair procedures, discuss future new directions in imaging strategies and methods being developed to measure cartilage thickness and volume measurements, and propose a magnetic resonance image protocol to evaluate cartilage that is achievable on most magnetic resonance scanners, vendor independent, practical (time and cost efficient), and accepted and used by a majority of musculoskeletal radiologists.
Journal ArticleDOI
Reproducibility and validity of workers' self-reports of physical work demands.
TL;DR: Suggestions for improving the design of reproducibility and validity studies and directions for future research in physical workload measurement are proposed.