State of the art on ChatPPG

#1 on MESA Sleep staging

0.78Cohen's κ (higher is better)

Method: wav2sleep
Reported in: wav2sleep: A Unified Multi-Modal Approach to Sleep Stage Classification from Physiological Signals · Table 5
Compared: 2 results under the same protocol; runner-up Bakker et al. (2021) 0.68
Protocol: 4-class (Wake, Light, Deep, REM) · PPG + thoracic respiratory effort · distinct train/validation/test sets · within-dataset · end-to-end training · 30 s epochs, whole night

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Results as reported by the authors; not independently reproduced. Awarded 2026-10-20; re-checked on every atlas sync.