Mobility Limitation Clinical Trial
Official title:
Mobility Assessment Using Surrogates in Elderly Participants
The purpose of this research study is to find out if mobility (the ability to move around) can be reliably assessed by having the family or care giver caregiver take a video based test for the patient. If this study shows that mobility can be assessed by family or caregiver, this information can be used in situations where mobility cannot be measured directly in patients. A total of 60 patients and 60 family/caregivers at Wake Forest Baptist Medical Center will take part in this study. Patients physical function will be assessed using a test that uses short movie clips to assess mobility. Patients will be asked to watch ten short (~10 seconds each) movie clips that describe various tasks such as climbing up hills or walking and estimate if they can perform the tasks. The familymember/caregiver will be also asked to answer the questions on behalf of the patient. The family member/caregiver will be asked to return to take the same test in the next 1-14 days. The patient will be in the study for one day. There is no intervention, this is observational.
According to the U.S. Census Bureau projections, the number of persons 65 years of age or
older will increase from roughly 40 million in the year 2010, to 88.5 million in 2050, a net
increase of 121%. During this same time period, the number of persons 85 years of age or
older will increase by 227%; accounting for nearly 5% of the U.S. population. Mobility and
functional status are important predictors of outcomes in this rapidly growing elderly
population. It has shown that walking speed and physical function, measured by Short Physical
Performance Battery (SPPB) are predictors of mortality in community-dwelling older men and
women. It was also reported that gait speed predicts incident disability in community
dwelling elderly subjects. In our prior study, we have demonstrated that, mobility, assessed
using an animated video clip based assessment tool, Mobility Assessment Tool-short form
(MAT-sf) predicts postoperative complications, length of stay and nursing home placement in
elderly patients (>69) who were undergoing elective surgery that requires overnight
hospitalization and more clinical practices use physical function and mobility as a tool to
predict outcomes.
However, these assessments are not always readily available, especially in clinical
situations when acute illnesses or injuries occurred without any chance to assess the
baseline status, such as acute myocardial infract, rapidly progressing sepsis or catastrophic
trauma. In these cases, patients are often sedated, intubated, have altered mental status, or
too unstable to perform even non-invasive testing. Although some clinicians or researchers
feel that surrogate can accurately assess the patients' baseline physical function and
mobility status, it was never been tested.
The investigators hypothesize that mobility assessment done on surrogates, using MAT-sf will
have high compatibility with the assessment done on elderly patients. Surrogates are defined
as a person who spends >2 hours a day or 8 hours a week with the patient and accompany the
patient to most of their medical appointments. The investigators will test the hypothesis at
the Preoperative Assessment Clinic since this clinic sees high volume of elderly patients and
patients at this clinic tend to have their caregiver with them during the appointments.
Investigators will enroll 20 patients in poor mobility group (MAT-sf < 51.38 in men and
<45.61 in women), 20 patients into the mid-mobility group (51.38< MAT-sf≤65.5 in men and
45.61≤MAT-sf<54.02) and 20 patients into the high mobility group (MAT-sf>65.5 in men and
MAT-sf>54.02 in women) for a total of 60 patients and one surrogate per patient for a total
of 120 unique participants.
To assess mobility, participants will be instructed on the use of the Mobility Assessment
Tool-short form (MAT-sf). The MAT-sf is a 10-item computer based assessment of mobility using
animated video clips. The 10 items in the MAT-sf cover a broad range of functioning. The
items include walking on level ground, a slow jog, walking outdoors on uneven terrain,
walking up a ramp with and without using a handrail, stepping over hurdles, ascending and
descending stairs with and without the use of a handrail, and climbing stairs while carrying
bags. The items were previously selected based on individual response and information curves
derived from Item Response Theory. Each item is accompanied by an animated video clip
together with the responses for that question (number of minutes, number of times, yes/no).
The test will be performed on an I-PAD and scores will be saved to an exportable file. The
time required to do the test with instructions from the examiner is expected to be no longer
than 5 minutes. While the patient is completing the MAT-sf assessment, the surrogate will be
directed to a separate room to complete MAT-sf for the patient ("Do you think Mr ** can climb
up this hill?) , so there is no interaction between the patient and the surrogate during the
assessment. Investigators will measure the compatibility between patients-surrogates mobility
using MAT-sf and will also assess the stability of surrogate MAT-sf.
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