Figure 3.
Bland–Altman plots comparing minutes in total sleep (A), light sleep (B), deep sleep (C), and REM sleep (D) between PSG and each device (Oura Ring, Fitbit, Apple Watch).
Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.