Outcome
Type |
Measure |
Description |
Time frame |
Safety issue |
Primary |
Gait speed |
Change in the ratio of post- to pre-intervention normal (habitual, self-selcted) walking speed (cm/s) in the immediate intervention group compared to the ratio of post- to pre-waiting normal walking speed in the delayed intervention group. |
II Group: pre-intervention (Week 1), post-intervention (Week 12), post-follow-up (Week 24); DI Group: first pre-intervention (Week 1), second pre-intervention (Week 12), post-intervention (Week 24), post-follow-up (Week 36) |
|
Secondary |
Cadence |
Cadence (number of steps per minute) quantified during gait analysis using the GAITRite electronic walkway system |
II Group: pre-intervention (Week 1), post-intervention (Week 12), post-follow-up (Week 24); DI Group: first pre-intervention (Week 1), second pre-intervention (Week 12), post-intervention (Week 24), post-follow-up (Week 36) |
|
Secondary |
Base of support |
Base of support (cm), the distance between heels, quantified during gait analysis using the GAITRite electronic walkway system. |
II Group: pre-intervention (Week 1), post-intervention (Week 12), post-follow-up (Week 24); DI Group: first pre-intervention (Week 1), second pre-intervention (Week 12), post-intervention (Week 24), post-follow-up (Week 36) |
|
Secondary |
Step width variability |
Step width variability (%) quantified during gait analysis using the GAITRite electronic walkway system. Variability calculated by the coefficient of varation=(standard deviation/mean)x100. |
II Group: pre-intervention (Week 1), post-intervention (Week 12), post-follow-up (Week 24); DI Group: first pre-intervention (Week 1), second pre-intervention (Week 12), post-intervention (Week 24), post-follow-up (Week 36) |
|
Secondary |
Single support time |
Single support time (s), an indirect measure of dynamic balance and gait certainty, quantified during gait analysis using the GAITRite electronic walkway system |
II Group: pre-intervention (Week 1), post-intervention (Week 12), post-follow-up (Week 24); DI Group: first pre-intervention (Week 1), second pre-intervention (Week 12), post-intervention (Week 24), post-follow-up (Week 36) |
|
Secondary |
Double support time |
Double support time (s), an indirect measure of dynamic balance and gait certainty, quantified during gait analysis using the GAITRite electronic walkway system |
II Group: pre-intervention (Week 1), post-intervention (Week 12), post-follow-up (Week 24); DI Group: first pre-intervention (Week 1), second pre-intervention (Week 12), post-intervention (Week 24), post-follow-up (Week 36) |
|
Secondary |
Stride time |
Stride time (s), also referred to as gait cycle time, quantified during gait analysis using the GAITRite electronic walkway system |
II Group: pre-intervention (Week 1), post-intervention (Week 12), post-follow-up (Week 24); DI Group: first pre-intervention (Week 1), second pre-intervention (Week 12), post-intervention (Week 24), post-follow-up (Week 36) |
|
Secondary |
Stride time variability |
Stride time variability (percent) quantified during gait analysis using the GAITRite electronic walkway system. Variability calculated by the coefficient of varation=(standard deviation/mean)x100. |
II Group: pre-intervention (Week 1), post-intervention (Week 12), post-follow-up (Week 24); DI Group: first pre-intervention (Week 1), second pre-intervention (Week 12), post-intervention (Week 24), post-follow-up (Week 36) |
|
Secondary |
Swing time |
Swing time (s), the time one leg is in the air during one gait cycle, quantified during gait analysis using the GAITRite electronic walkway system. |
II Group: pre-intervention (Week 1), post-intervention (Week 12), post-follow-up (Week 24); DI Group: first pre-intervention (Week 1), second pre-intervention (Week 12), post-intervention (Week 24), post-follow-up (Week 36) |
|
Secondary |
Swing time variability |
Swing time variability (percent) quantified during gait analysis using the GAITRite electronic walkway system. Variability calculated by the coefficient of varation=(standard deviation/mean)x100. |
II Group: pre-intervention (Week 1), post-intervention (Week 12), post-follow-up (Week 24); DI Group: first pre-intervention (Week 1), second pre-intervention (Week 12), post-intervention (Week 24), post-follow-up (Week 36) |
|
Secondary |
Timed Up and Go Test |
Standardized assessment of general mobility in older adults, time measured in seconds using a stopwatch |
II Group: pre-intervention (Week 1), post-intervention (Week 12), post-follow-up (Week 24); DI Group: first pre-intervention (Week 1), second pre-intervention (Week 12), post-intervention (Week 24), post-follow-up (Week 36) |
|
Secondary |
Timed Up and Go Test, imagined |
After performing the Timed Up and Go Test, the participant remains seated and imagines performing the Timed Up and Go Test. Test time is measured in seconds using a stopwatch. Time for imagined test performance that is twice as fast or faster than real test performance time reflect possible cognitive difficulties as well as walking difficulties, particularly under dual or multi-task conditions. |
II Group: pre-intervention (Week 1), post-intervention (Week 12), post-follow-up (Week 24); DI Group: first pre-intervention (Week 1), second pre-intervention (Week 12), post-intervention (Week 24), post-follow-up (Week 36) |
|
Secondary |
Short Physical Performance Battery |
Standardized assessment of physical performance with measurements of muscle strength, balance and walking. Results range from 0 to 12 points, higher point score represents better physical performance. |
II Group: pre-intervention (Week 1), post-intervention (Week 12), post-follow-up (Week 24); DI Group: first pre-intervention (Week 1), second pre-intervention (Week 12), post-intervention (Week 24), post-follow-up (Week 36) |
|
Secondary |
Continuous Scale of Physical Functional Performance Test |
Strandardized assessment of physical functional performance of 10 tasks of daily living. Task results measured as time (s), weight (kg) and/or distance (cm or m, depending on task) are transformed by the assessment software into scaled scores ranging from 0 to 100 points, with higher point scores reflecting better performance and greater liklihood of independent living. Total score (0-100 points) and well as subscores (0-100 points) of five domains of physical functional perfomance are provided: upper body strength, upper body flexibility, lower body strength, balance and coordination, and endurance |
II Group: pre-intervention (Week 1), post-intervention (Week 12), post-follow-up (Week 24); DI Group: first pre-intervention (Week 1), second pre-intervention (Week 12), post-intervention (Week 24), post-follow-up (Week 36) |
|
Secondary |
Physical Activity Scale for the Elderly |
Standardized, self-report questionnaire to measure physical activity levels in older people as well as to assess the effectiveness of exercise interventions. From a list of 12 types of activities and referring to the previous week, participants report how many days per week and for how many hours per day they performed each activity. Scores are calculated by multiplying the weight (activity weights are provided in a table for PASE scoring) by the frequency values for each of 12 types of activities. Scores may range from zero to 400 or more. Higher scores reflect higher levels of physical activity. |
II Group: pre-intervention (Week 1), post-intervention (Week 12), post-follow-up (Week 24); DI Group: first pre-intervention (Week 1), second pre-intervention (Week 12), post-intervention (Week 24), post-follow-up (Week 36) |
|
Secondary |
Grip strength |
Grip strength, as a surrogate marker of overall muscle strength, measured using a Martin vigorimater (kPa) |
II Group: pre-intervention (Week 1), post-intervention (Week 12), post-follow-up (Week 24); DI Group: first pre-intervention (Week 1), second pre-intervention (Week 12), post-intervention (Week 24), post-follow-up (Week 36) |
|
Secondary |
5x Sit to Stand Test |
General functional measure of lower body strength, measured in seconds using a stop watch, performed as part of the Short Physical Performance Battery. |
II Group: pre-intervention (Week 1), post-intervention (Week 12), post-follow-up (Week 24); DI Group: first pre-intervention (Week 1), second pre-intervention (Week 12), post-intervention (Week 24), post-follow-up (Week 36) |
|
Secondary |
Modified Clinical Test of Sensory lnteraction and Balance |
Assesses balance under four test conditions. Time to perform each task is measured in seconds with a stopwatch, results range from not being able to perform a task to maximal task time of 30 seconds. Postural sway will be measured during each task with the APDM system (measured in angle, m/s2, Hz or m2/s4, depending on paramter) |
II Group: pre-intervention (Week 1), post-intervention (Week 12), post-follow-up (Week 24); DI Group: first pre-intervention (Week 1), second pre-intervention (Week 12), post-intervention (Week 24), post-follow-up (Week 36) |
|
Secondary |
Falls |
Fall incidence will be documented from the pre-intervention assessment until the end of the follow-up period via monthly diaries completed by study participants as well as via monthly phone calls with the study team. |
II Group: pre-intervention (Week 1), post-intervention (Week 12), post-follow-up (Week 24); DI Group: first pre-intervention (Week 1), second pre-intervention (Week 12), post-intervention (Week 24), and monthly throughout the trial duration for II and DI |
|
Secondary |
Fear of falling |
Self-reported using the Falls Efficacy Scale-lnternational version (FES-I) questionnaire (scores range from 1 to 64 points, higher point scores reflect greater subjective fear of falling), as well as binary responses (yes/no) of participants at each clinical visit |
II Group: pre-intervention (Week 1), post-intervention (Week 12), post-follow-up (Week 24); DI Group: first pre-intervention (Week 1), second pre-intervention (Week 12), post-intervention (Week 24), post-follow-up (Week 36) |
|
Secondary |
Montreal Cognitive Assessment test |
Standardized test of general cognition, administered by trained site staff. Scores range from 0 to 30 points, higher point scores reflect better cognition |
II Group: pre-intervention (Week 1), post-intervention (Week 12), post-follow-up (Week 24); DI Group: first pre-intervention (Week 1), second pre-intervention (Week 12), post-intervention (Week 24), post-follow-up (Week 36) |
|
Secondary |
Short Form-36, version 2, acute recall assessment of health-related quality of life |
This self-report questionnaire is a reliable and valid tool for measuring health-related quality of life. It consists of 36 questions (acute recall = previous week) reflecting eight domains of health and provides eight scaled scores, which are the weighted sums of the questions in each respective domain. Each scale is directly transformed into a score of 0 to 100 points on the assumption that each question carries equal weight. Lower scores are associated with greater disability and lower quality of life. |
II Group: pre-intervention (Week 1), post-intervention (Week 12), post-follow-up (Week 24); DI Group: first pre-intervention (Week 1), second pre-intervention (Week 12), post-intervention (Week 24), post-follow-up (Week 36) |
|
Secondary |
lntervention course attendance |
Number of intervention courses from maximum 24 that each participant attends, as a marker of intervention adherence, will be documented by course instructors at each class |
At each course lesson (twice weekly throughout the 12 week intervention period) for the II and the DI group |
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