Σφακιανάκης Αλέξανδρος
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Σάββατο 10 Μαρτίου 2018

Comparison of Self-Report Versus Sensor-Based Methods for Measuring the Amount of Upper Limb Activity Outside the Clinic

Publication date: Available online 10 March 2018
Source:Archives of Physical Medicine and Rehabilitation
Author(s): Kimberly J. Waddell, Catherine E. Lang
ObjectiveTo compare self-reported with sensor-measured upper limb (UL) performance in daily life for individuals with chronic (≥6mo) UL paresis poststroke.DesignSecondary analysis of participants enrolled in a phase II randomized, parallel, dose-response UL movement trial. This analysis compared the accuracy and consistency between self-reported UL performance and sensor-measured UL performance at baseline and immediately post an 8-week intensive UL task-specific intervention.SettingOutpatient rehabilitation.ParticipantsCommunity-dwelling individuals with chronic (≥6mo) UL paresis poststroke (N=64).InterventionsNot applicable.Main Outcome MeasuresMotor Activity Log amount of use scale and the sensor-derived use ratio from wrist-worn accelerometers.ResultsThere was a high degree of variability between self-reported UL performance and the sensor-derived use ratio. Using sensor-based values as a reference, 3 distinct categories were identified: accurate reporters (reporting difference ±0.1), overreporters (difference >0.1), and underreporters (difference <−0.1). Five of 64 participants accurately self-reported UL performance at baseline and postintervention. Over half of participants (52%) switched categories from pre-to postintervention (eg, moved from underreporting preintervention to overreporting postintervention). For the consistent reporters, no participant characteristics were found to influence whether someone over- or underreported performance compared with sensor-based assessment.ConclusionsParticipants did not consistently or accurately self-report UL performance when compared with the sensor-derived use ratio. Although self-report and sensor-based assessments are moderately associated and appear similar conceptually, these results suggest self-reported UL performance is often not consistent with sensor-measured performance and the measures cannot be used interchangeably.



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