Open Access
Use of the iPhone for Cobb angle measurement in scoliosis
Reads0
Chats0
TLDR
The widespread availability of inclinometer-equipped mobile phones and the ability to store measurements in later versions of the angle measurement software may make these new technologies attractive for clinical measurement applications.Abstract:
Purpose:
The Cobb technique is the universally accepted method for measuring the severity of spinal deformities. Traditionally, Cobb angles have been measured using protractor and pencil on hardcopy radiographic films. The new generation of mobile phones make accurate angle measurement possible using an integrated accelerometer, providing a potentially useful clinical tool for assessing Cobb angles. The purpose of this study was to compare Cobb angle measurements performed using an Apple iPhone and traditional protractor in a series of twenty Adolescent Idiopathic Scoliosis patients.
Methods:
Seven observers measured major Cobb angles on twenty pre-operative postero-anterior radiographs of Adolescent Idiopathic Scoliosis patients with both a standard protractor and using an Apple iPhone. Five of the observers repeated the measurements at least a week after the original measurements.
Results:
The mean absolute difference between pairs of iPhone/protractor measurements was 2.1°, with a small (1°) bias toward lower Cobb angles with the iPhone. 95% confidence intervals for intra-observer variability were ±3.3° for the protractor and ±3.9° for the iPhone. 95% confidence intervals for inter-observer variability were ±8.3° for the iPhone and ±7.1° for the protractor. Both of these confidence intervals were within the range of previously published Cobb measurement studies.
Conclusions:
We conclude that the iPhone is an equivalent Cobb measurement tool to the manual protractor, and measurement times are about 15% less. The widespread availability of inclinometer-equipped mobile phones and the ability to store measurements in later versions of the angle measurement software may make these new technologies attractive for clinical measurement applications.read more
Citations
More filters
Cuidados, aspectos psicológicos y actividad física en relación con la salud. Volumen II
María del Carmen Pérez Fuentes,María del Mar Molero Jurado,José Jesús Gázquez Linares,María del Mar Simón Márquez,África Martos Martínez,Ana Belén Barragán Martín,Nieves Fátima Oropesa Ruiz +6 more
Differences in trunk accelerometry between frail and non-frail elderly persons in functional tasks
TL;DR: In this paper, the authors measured and described the variability of acceleration, angular velocity and trunk displacement in the ten meter Extended Timed Get-Up-and-Go test in two groups of frail and non-frail elderly people through instrumentation with the iPhone4® smartphone.
Evaluation of the iPhone with an acrylic sleeve versus the Scoliometer for rib hump measurement in scoliosis
TL;DR: The iPhone is a clinically equivalent rib hump measurement tool to the Scoliometer in spinal deformity patients, and avoids the variables of patient fatigue and discomfort, inconsistent positioning and deformity progression using human subjects in a single or multiple measurement sessions.
Differences in trunk accelerometry between frail and nonfrail elderly persons in sit-to-stand and stand-to-sit transitions based on a mobile inertial sensor
TL;DR: In this article, the authors measured the variability of the accelerations, angular velocity, and displacement of the trunk during the Sit-to-Sit and Stand-To-Sit transitions in two groups of frail and physically active elderly persons, through instrumentation with the iPhone 4 smartphone.
Dissertation
Mobile smartphone applications for healthcare practitioners
TL;DR: In this article, the authors employ a novel investigative approach based on Realist Evaluation to investigate the prevalence and outcomes of mobile apps and uncover the key causal mechanisms and contexts that influence their use.
References
More filters
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.
Journal ArticleDOI
Adolescent Idiopathic Scoliosis: A New Classification to Determine Extent of Spinal Arthrodesis
Lawrence G. Lenke,Randal R. Betz,Jürgen Harms,Keith H. Bridwell,David H. Clements,Thomas G. Lowe,Kathy Blanke +6 more
TL;DR: A new two-dimensional classification of adolescent idiopathic scoliosis, as tested by two groups of surgeons, was shown to be much more reliable than the King system.
Journal ArticleDOI
Applying the right statistics: analyses of measurement studies
J M Bland,Douglas G. Altman +1 more
TL;DR: The problems of some applications of correlation and regression methods to these studies are described, using recent examples from this literature, and the 95% limits of agreement approach and a similar, appropriate, regression technique are described.