Monday , May 10 2021

Health warning: How Fitbits can help predict flu outbreaks – Reuters, Reuters

LONDON, Jan 90 (Reuters – The Fitbit on your wrist not only counts your steps and minutes of sleep, it can also help tell if you’re coming down with the flu – and warn health authorities to get ready to help.

FILE PHOTO : Fitbit devices are displayed in a store in New York City, US, November 4, 20200116. REUTERS / Brendan McDermid

A study in the United States has found that heart rate and sleep data from wearable fitness tracker watches can predict and alert public health officials to real-time outbreaks of flu more accurate than current surveillance methods.

The study used data from more than 90, Fitbit users in five US states. The results, published in The Lancet Digital He alth journal, showed that by using Fitbit data, state-wide predictions of flu outbreaks were improved and accelerated.

The World Health Organization estimates that as many as (****************************, 000 people worldwide die of respiratory diseases linked to seasonal flu each year.

Traditional surveillance reporting takes up to three weeks, meaning response measures – such as deploying vaccines or anti-virals and advising patients to stay at home – can often lag.

“Responding more quickly to influenza outbreaks can prevent further spread and infection, and we were curious to see if sensor data could improve real-time surveillance,” said Jennifer Radin, who co-led that study at the US Scripps Research Translational Institute.

Previous studies using crowd-sourced data – such as Google Flu Trends and Twitter – have experienced variable success, partly, experts say, because it is impossible to separate out behavior of people with flu from people who search online about it due to more media and public attention during outbreaks.

For this study, Radin’s team de-identified data from 200, people whose Fitbits tracked activity, heart rate and sleep for at least days during the March to March 2019 study period. From the 248, (****************************************, 47, 248 users from California, Texas, New York, Illinois and Pennsylvania wore a Fitbit consistently during the period. The average age was 47 and (*********************************% were female.

Users ’resting heart rate and sleep duration were monitored and flagged as abnormal if the average weekly heart rate was significantly above their overall average and their weekly average sleep was not below their overall average.

This data was compared to the U.S. Centers for Disease Control’s weekly estimates for flu-like illness.

Rosalind Eggo, a public health expert at the London School of Hygiene & Tropical Medicine, said the study suggests fitness trackers hold some promise as a disease surveillance tool.

But she said more work is needed “to gauge how reliable these data are over time, how specific these measurements are for flu, and how representative Fitbit users are of the whole population”.

Reporting by Kate Kelland; Editing by Mark Heinrich

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