A new study by scientists at Scripps Research describes a tool that could help public health officials spot and contain COVID-19 outbreaks.
You might already be wearing it.
One in five Americans owns a wearable device, such as a Fitbit or Apple Watch. These gadgets monitor your heart rate, how many steps you take, and your sleep patterns — measurements that often change when you’re sick.
Scripps scientists found that combining wearable device data with symptoms predicted whether a person had COVID-19 better than either input on its own. That makes these popular devices a way to potentially track the scope and spread of the pandemic, says Dr. Eric Topol, director and founder of the Scripps Research Translational Institute and executive vice president of Scripps Research.
“Everyone talks about ‘test, test, test.’ That isn’t working,” said Topol, one of the study’s authors. “We need other ways to track the toll of the virus and who might be affected.”
The study findings, published Thursday in the journal Nature Medicine, are part of the ongoing DETECT study (Digital Engagement & Tracking for Early Control & Treatment). Roughly 30,000 people across the U.S. enrolled between March 25 and June 7, sharing data from their wearable devices and reporting symptoms when they felt sick.
About 3,800 participants reported symptoms that ranged from a stomachache to a cough to difficulty breathing and a loss of taste and smell. Of those who felt sick, 333 were tested for COVID-19; 54 tested positive and 279 tested negative.
The researchers then tried to predict who would test positive or negative with a statistical model based on self-reported symptoms; it performed about as well as a model based on wearable device data (heart rate, step count and sleep length). But combining the two predicted COVID-19 test results best.
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