PROJECT DAMA: PORTABLE DEVICE FOR KINEMATIC GAIT ASSESSMENT OF INDIVIDUALS POST-STROKE
Stroke Rehabilitation. Gait Analysis. Wearable Devices. Psychometric Evaluation. Validity. Reliability. Measurement Error.
ABSTRACT
Introduction: Portable devices based on inertial sensors can be useful in assessing the kinematic gait parameters of post-stroke individuals. However, information on their psychometric properties is still scarce. Objectives: To investigate the accuracy of currently available portable devices with inertial sensors in evaluating post-stroke kinematic gait outcomes and to develop a valid and reliable portable device to assess these parameters. Methods: Two studies were conducted comprising three articles (one published, one submitted, and one for immediate submission). Study 1 consists of a systematic review (SR) encompassing a protocol (published) and the final results of a systematic review (submitted). The SR followed the guidelines of the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA), assessed the psychometric properties, reliability, and measurement error of wearable technologies used to evaluate post-stroke gait, and investigated which portable devices have been used to assess angular measures during post-stroke gait. Study 2 involved the development and preliminary testing of the "DAMA - Portable Device for Kinematic Gait Assessment of Post-Stroke Individuals" in evaluating ankle angular measures during gait. Results and Conclusions: The systematic review identified three main psychometric properties of the evaluated devices: validity, reliability, and measurement error. The devices showed good reliability in measuring step count and gait speed, but the quality of this evidence is low. Therefore, methodologically rigorous studies are needed to assess these properties. Additionally, few studies have analyzed angular measures, indicating the need for more studies that evaluate this topic. Study 2 demonstrated that the DAMA is capable of obtaining ankle measurements comparable to a gold standard, including initial contact (IC) angle, toe-off (TO) angle, maximum dorsiflexion (DF) angle, and maximum plantarflexion (PF) angle. A high positive correlation was found for PF (r=1.000; p<0.01) and a high negative correlation for IC (r=-1.000; p<0.01). However, the limited sample size prevents definitive conclusions about the DAMA's performance, requiring additional studies with larger samples. The high negative correlation for IC suggests the need for adjustments in the device. These studies are essential to guide clinicians and researchers in choosing accurate assessment tools, which are fundamental for developing effective protocols to improve the gait of post-stroke patients.