Miriam C Morey PhD miriammoreydukeedu Older Americans Independence Center Objectives Objective 1 Provide an overview of the 6th Vital sign smartphone application Objective 2 ID: 732636
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Slide1
The 6th Vital Sign: a Mobile App for Population Health Surveillance of Walking Speed
Miriam C. Morey, Ph.D.miriam.morey@duke.edu
Older
Americans Independence CenterSlide2
ObjectivesObjective 1: Provide an overview of the 6th Vital sign smartphone applicationObjective 2: Describe demographics and test results of initial application usersSlide3
EVIDENCE IS CLEARSlide4
0 mph
0.4 mph
0.9 mph
1.3 mph
1.8 mph
2.2 mph
2.7 mph
3.1 mph
10 meter walk time
50 sec
25 sec16.7 sec12.5 sec10 sec8.3 sec7.1 sec10 foot walk time15.2 sec7.6 sec5 sec3.8 sec3 sec2.5 sec2.2 sec
Fritz, Stacy et al., J. Geriatric Physical Therapy, 2009
4Slide5Slide6
Why did we create this research study for a smartphone?
Vital signs are indicators of general physical health status
Walking speed has also been shown to be an important vital sign
Uptake of walk tests in healthcare is slow Slide7
Why did we create this research study for a smartphone?
The 6th Vital Sign Study aims to establish walking speed as a new standard for measuring physical health on an iPhone easily, anywhere, and by anyone Slide8
LAUNCHED APRIL 10, 2016Slide9
To examine uptake of this approach to collecting data from under-reached populations
To measure functional status, including gait speed and self-reported health, on an unlimited potential population across gender, race, and socio-geographical strata through 2020 to establish
:
region-
and population-specific normative data
minimal clinically important differences for improvement
markers of clinical endpoints
associations with other measures of health and well-being
Sixth Vital Sign Study AimsSlide10
Self-led
Anytime from Anywhere
Stop and complete later
Participate 1x
Compare to population norms
Repeat test
Share resultsSlide11Slide12
Many Screens+FullConsent Document
…Then SignSlide13
After some basic demographics:Slide14
Total Views in 50 days = 1,111(29.6% pre-launch and 70.4% post)
# of Downloads: 771 (69.4%)(52.9% pre-launch, 76.3% post)
Consented
to Participate
398
51.6% of downloads
35.8% of those viewed
1
– 10
11 – 20 21 – 30 31 – 40 41 - 50 Days Soft or Pre-LaunchApril 10Duke Forward Launch May 4
N&O Web/Print Article May 9
FIRST 50 DAYSAccessed in iTunes and Number of DownloadsSlide15
27 # of states with at least 1 study participant65 % within a 100 mile radius of Duke54 Median age of study participants
22 % 65 years or older
FIRST 50 DAYS
Study Participants by the Numbers
58 % female
89 % White
7 % with ≤12 years of ed. (high school)
76 % living with a chronic health condition
(predominantly high cholesterol,
hypertension, or joint pain)Slide16
Validation Study (N=60, ages 18-64 years)Differences between 6VS App and Standard Observer
Gait Parameter
Condition Tested
6VS
App
(
Mean)
Observer
(
Mean)
Mean DifferenceStepsSwinging Arm214 229 15.22 *(number)Held in Front21423116.24 *Bag221 23210.94 *
Pocket
225 231 6.00 DistanceSwinging Arm
528
527
0.46
(feet)
Held in Front
502
526
23.56
Bag
534
538
4.11
Pocket
471
533
61.86 *
Speed
Swinging Arm
4.40
5.2
0.76
(
ft
/ sec)
Held in Front
4.23
4.4
0.15
Bag
4.45
4.5
0.04
Pocket
3.93
4.4
0.52 *Slide17
Of 866 consented participants in the first year, 179 (20.7%) were ≥ 65 years (145 completed valid walk tests) Sex Older Old 88 female (49%) 46 participants ≥75 years (25.7%)
Older Adult Participation
(no direct recruitment)Slide18
“Usual Pace” vs. Bohannon Meta-Analysis
*Grand mean (95% CI) range
Strata Sex (Age in Years)
N
Mean m/sec
Meta-Analysis*
Men (60
to
69)
721.341.03 – 1.59Men (70 to 79)371.420.96 – 1.42Men (80 to 99)91.230.61 – 1.22Women (60 to 69)701.420.97 – 1.45Women (70 to 79)251.340.83 – 1.50Women (80 to 99)51.150.56 – 1.17Slide19
sixthvitalsign.researchkit.duke.edu
SIGN UP TODAY!!!!!!!
Take the test and join usSlide20
Meet the TeamSlide21
Janet.Bettger@duke.edu
For questions and comments
6
th
The
Optimizing and preserving physical functioning is a central goal for living a healthy life. Slide22
PHYSICAL ACTIVITYSlide23
Older Adult Participation (no direct recruitment)Of 871 consented participants in the first year, 221 (25.4%) were ≥ 65 years Sex Older Old 113 female 52 participants ≥ 75 years