State of the art on ChatPPG

#1 on MESA Sleep staging

0.742Cohen's κ (higher is better)

Method: wav2sleep (trained on all signals)
Reported in: wav2sleep: A Unified Multi-Modal Approach to Sleep Stage Classification from Physiological Signals · Table 3
Compared: 5 results under the same protocol; runner-up wav2sleep (ECG→PPG transfer) 0.732
Protocol: 4-class (Wake, Light, Deep, REM) · PPG only at test time · held-out test participants · 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.