Longitudinal Analysis of Gait Variability to Predict Falls in Parkinson's Disease
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|ClinicalTrials.gov Identifier: NCT04339543|
Recruitment Status : Recruiting
First Posted : April 9, 2020
Last Update Posted : May 4, 2020
|Condition or disease||Intervention/treatment||Phase|
|Parkinson Disease Healthy Aging||Other: Cognitive dual-task walking||Not Applicable|
Participants will take part in a baseline study session, followed by a year of weekly reports of their number of near falls and falls. The same participants will repeat the same study session six months and twelve months after the baseline session.
Each of the three study sessions will have a similar design. Each participant will make a visit of approximately 2 hours to the laboratory. At baseline, all participants will complete a medical history questionnaire which will confirm that all inclusion criteria are met. At each measurement interval (i.e., baseline, six-month and twelve-month), participants will be evaluated through a series of examinations and questionnaires prior to data collection. PD patients will be tested at their self-reported peak dose of medication ('on'-state). Upon completion of the tests and questionnaires, participants will be prepared for data collection (footswitches and strap-based IMUs).
The effect of dual tasking will be examined through three conditions performed in the following order: single-cognitive testing, which will consist in a phoneme monitoring task (seated in a quiet room with headphones); single-walking, which will consist of simply walking normally (silent headphones); and dual-task walking, which will consist in walking while performing the phoneme monitoring task. The phoneme monitoring task will consist in listening to a text through headphones, and participants will be asked to i) answer ten questions regarding the content of the text after the task, and ii) count how many times two predefined words appeared in the text. During single and dual-task walking, participants will be asked to walk around the track at a speed that they feel would be comfortable while walking through the grocery store or walking to their car, with no instructions regarding the priority to give to each task (walking vs. cognitive task). The texts presented during single-task cognitive testing and dual-task walking will be different.
Each trial will last approximately ten minutes, which is required to collect at least 500 stride time intervals for a reliable estimation of the temporal ordering of stride-to-stride fluctuations. Participants will rest between trials for at least five minutes and will be able to rest more if they so desire. Two investigators will always be present during data collection and will walk behind the participant during the walking trials for safety purposes.
All participants will be followed for twelve months and will report their falls and near falls experiences. After the baseline session, participants will be provided with a fall diary, in which they will write the date, time, cause, circumstances under which falls or near falls occurred, and the occurrence of any fall-related injury. Participants will be instructed to daily fill the diary and return it every two weeks (with self-addressed stamped return envelope), or to communicate the information via email. In addition, each month participating personnel will call participants to ensure all falls and near falls were reported in case participants fail to fill in the fall diary. Participants will also be called if the investigators do not receive their report a week after the expected date of reception.
|Study Type :||Interventional (Clinical Trial)|
|Estimated Enrollment :||120 participants|
|Intervention Model:||Single Group Assignment|
|Masking:||None (Open Label)|
|Official Title:||Longitudinal Assessment of Gait Variability to Predict Falls in Parkinson's Disease|
|Actual Study Start Date :||February 28, 2020|
|Estimated Primary Completion Date :||August 2022|
|Estimated Study Completion Date :||August 2022|
Other: Cognitive dual-task walking
• The task will consist in walking while performing the phoneme monitoring task. The phoneme monitoring task will consist in listening to a text through headphones, and participants will be asked to i) answer ten questions regarding the content of the text after the task, and ii) count how many times two predefined words appeared in the text. During single and dual-task walking, participants will be asked to walk around the track at a speed that they feel would be comfortable while walking through the grocery store or walking to their car, with no instructions regarding the priority to give to each task (walking vs. cognitive task).
- Change in scaling exponent of stride time series every 6-months [ Time Frame: Baseline, 6-month follow-up, 12-months follow-up ]Using the detrended fluctuation analysis (DFA). Briefly, DFA estimate the relationship between the size of fluctuations and the size of the 'box' from which these fluctuations are observed. Stride time fluctuations typically scale with the size of the box in a power-law relationship. The slope of this relationship in bi-logarithmic coordinate thus provide the scaling exponent which reflect the degree of scale invariance.
- Falls and near falls [ Time Frame: 12-months ]Number and type of falls and near falls experienced, reported in a diary.
- Change in gait biomechanics every 6-months [ Time Frame: Baseline, 6-month follow-up, 12-months follow-up ]Sub-phases of stride cycles, in particular the stance phase (i.e., when the foot is in contact with the ground) and the swing phase (i.e., when the foot is in the air), which will provide information about balance control mechanisms; medial-lateral center of mass movements and local stability, estimated with the Lyapunov exponent, using data from the pelvis sensor, which will provide information about gait stability; coordination between arm and leg movements, which will inform about the degree of rigidity and central synchronization between the arms during walking.
To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.
Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT04339543
|Contact: Vivien Marmelat, PhDemail@example.com|
|United States, Nebraska|
|University of Nebraska at Omaha||Recruiting|
|Omaha, Nebraska, United States, 68182|
|Contact: Jeffrey Kaipust 402-554-3238 firstname.lastname@example.org|
|Study Director:||Nicholas Stergiou, PhD||University of Nebraska, Omaha|