![]() ![]() To investigate statistical agreement between the two sensors we used the Bland-Altman method. We calculated the Coefficient of Multiple Correlation between the two sensors acceleration signal of each subject, in each sub-stage, in each of the three Extended Timed Get Up and Go test trials. Test-retest reliability of the kinematic measurements of the iPhone 4® compared with a standard validated laboratory device. MethodsĪ repeated measure, cross-sectional, analytical study. Extended Timed Get Up and Go is a clinical test with that the patient get up from the chair and walking ten meters, turn and coming back to the chair. ![]() The present study aimed to evaluate the reliability and concurrent criterion-related validity of the accelerations with an iPhone 4® in an Extended Timed Get Up and Go test. An iPhone 4® mounted a three dimensional accelerometer subsystem with highly robust software applications. The capacity to diagnosys, quantify and evaluate movement beyond the general confines of a clinical environment under effectiveness conditions may alleviate rampant strain on limited, expensive and highly specialized medical resources.
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