Published on in Vol 24, No 1 (2022): January
Preprints (earlier versions) of this paper are
available at
https://preprints.jmir.org/preprint/27487, first published
.
![Accuracy Assessment of Oura Ring Nocturnal Heart Rate and Heart Rate Variability in Comparison With Electrocardiography in Time and Frequency Domains: Comprehensive Analysis Accuracy Assessment of Oura Ring Nocturnal Heart Rate and Heart Rate Variability in Comparison With Electrocardiography in Time and Frequency Domains: Comprehensive Analysis](https://asset.jmir.pub/assets/c5a83fbd1df5417ac42e151d92bd87f2.png 480w,https://asset.jmir.pub/assets/c5a83fbd1df5417ac42e151d92bd87f2.png 960w,https://asset.jmir.pub/assets/c5a83fbd1df5417ac42e151d92bd87f2.png 1920w,https://asset.jmir.pub/assets/c5a83fbd1df5417ac42e151d92bd87f2.png 2500w)
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