Made the graph using Python.
x = 4-stage kappa vs PSG
e = |TST_tracker – TST_PSG|
y = max(0, 100 – (100/60) × e)
So right = better staging, up = lower sleep time error, top-right = closest to PSG.
Data is from published PSG validation studies in 2022, 2024 and 2025.
by Impressive_Suit4370
2 Comments
Wow, really thought Whoop was a gold standard… shows how much marketing can make your company’s perception.
I’m confused about the S8 (2024) and S8 (2025). The S8 came out in 2022. The S10 came out in 2024, and S11 in 2025. What do these two dots represent?