Stanford Sleep Study Finds Huami Smartwatch Provides Clinical-Grade Accuracy
March 07 2019 - 8:00AM
Business Wire
Amazfit Arc Tracks and Detects Sleep Phases
Better Than $1,000 Alternative
Huami, the second largest wearables company globally1, announced
today the results of its wearable device sleep study with Stanford
University Center for Sleep Sciences and Medicine, which conducts
research and clinical and educational programs to improve patient
care. According to the results of the study, Huami’s Amazfit Arc, a
consumer wearable device, tracks sleep and wake periods with better
accuracy than a commonly used clinical-grade actigraph, suggesting
that Arc is a cost-effective research alternative for large-scale,
clinical studies and trials.
Researchers studied minute-by-minute activity data collected
from two different wearables -- Amazfit Arc and Actiwatch Spectrum
by Philips -- which were worn by 31 participants over a 48-hour
period. Twelve participants had no significant health issues or
sleep disorders and the remaining 19 participants were patients
from the Stanford University sleep clinic. Time-stamped data from
each participant was recorded and compared. Researchers concluded
that Arc and Actiwatch data were highly correlated, with the Arc
yielding fundamentally similar sleep scoring metrics as to
Actiwatch.
“Actigraphs are widely used portable wrist-worn devices that
record the amount and timing of a person’s sleep and wake, but
their clinical use is highly limited by their expense,” said Elaine
Huo, Head of U.S. Marketing for Huami. “Until now, there was a lack
of independent validation for cost-effective research alternatives.
This study is the first of its kind to prove that a consumer
wearable device can be used as an actigraph for sleep monitoring
and that Amazfit Arc is able to produce data comparable to a
research-grade actigraph.”
Additional Study Highlights
- The auto- and low-scoring settings on
the Actiwatch software (Actiware) were used to determine sleep and
wake from the Actiwatch data and were used as the comparators.
- Receiver operating characteristic
curves were used to optimize the relationship between the
devices.
- Minute-by-minute Arc and Actiwatch data
were highly correlated (r = 0.94, Spearman correlation) over the
48-h study period.
- Treating the Actiwatch auto scoring as
the gold standard for determination of sleep and wake, Arc has an
overall accuracy of 99.0% ± 0.17% (SEM), a sensitivity of 99.4% ±
0.19%, and a specificity of 84.5% ± 1.9% for the determination of
sleep.
- As compared to the Actiwatch low
scoring, Arc has an overall accuracy of 95.2% ± 0.36%, a
sensitivity of 95.7% ± 0.47%, and a specificity of 91.7% ± 0.60%
for the determination of sleep.
“We are pleased to provide researchers worldwide with an
opportunity to advance the field of sleep study like never before
and to offer consumers medical-grade data accuracy for less than
$70 USD,” added Huo. “The promising results of the Stanford sleep
study is another significant milestone for Huami and largely
confirms what users and reviewers have been touting from the
beginning -- that Amazfit offers the best low-key casual smartwatch
around at a remarkable bargain, just like the Casio of the 21st
century.”
For more information about the wearable device sleep study with
Stanford University Center for Sleep Sciences and Medicine and
Huami, visit the report: Validation of minute-to-minute scoring for
sleep and wake periods in a consumer wearable device compared to an
actigraphy device.
About Huami
Huami is a biometric and activity data-driven company with
significant expertise in smart wearable technology. Since its
inception in 2013, Huami has quickly established its global market
leadership and recognition by shipping millions of smart wearable
devices. In 2017, Huami shipped 18.1 Million units of smart
wearable devices, more than any other company in the world,
according to Frost & Sullivan. Huami owns a large biometric and
activity database in the global smart wearables industry. Huami's
mobile apps, Mi Fit and Amazfit, collect over ten dimensions of
measurement including heart rate, electrocardiogram data, weight,
body fat compositions, GPS running track, steps, sleeping duration,
and more. Huami's mobile apps work hand in hand with its smart
wearable devices and provide users with a comprehensive view and
analysis of their data. With a wide range of data from a large
number of users, Huami is well-positioned to develop new
application scenarios for smart wearable technology and drive
innovation. Huami has been the sole partner of Xiaomi, a leading
mobile internet company and global consumer electronics brand, to
design and manufacture Xiaomi-branded smart bands, watches
(excluding children watches and quartz watches), scales and
associated accessories, including the Mi Band series.
For more information please visit https://us.amazfit.com/
1 IDC Worldwide Quarterly Wearable Device Tracker Q2/2018
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Jennifer PierceMedia Relations for Huami
USHello@jenniferpierce.co203.948.5623
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