Real ChatGPT answer · index seedmYWX3ToIRUscompleteHealth and wellness · common conditions and symptomsinformational

What are the latest clinical findings on whether Fitbit sleep score algorithms accurately differentiate between REM and deep sleep stages for adults over forty?

ChatGPTgpt-61 query10/31/2026
Download run

Fan-out diagram

The searches the AI actually ran for this prompt.

SEED QUERY
What are the latest clinical findings on whether Fitbit sleep score algorithms accurately differentiate between REM and deep sleep stages for adults over forty?
1 real search · 1 real-search pass
2025 2026 clinical validation Fitbit sleep stage accuracy REM deep sleep polysomnography adults age 40 olderGoogle ↗
OBSERVED

Badge and edge weight = share of passes that produced the query. Hover a query for its intent and routing format.

Query classes

Google's semantic query class for every sub-query: what kind of answer each search is after, simulated vs real.

Classifying 1 queries…

Searches and sources

Queries

1 queries · click a column to sort
Query / typeSearchIntentQuery classRouting formatClusterFreq ↓Weight
2025 2026 clinical validation Fitbit sleep stage accuracy REM deep sleep polysomnography adults age 40 older
OBSERVED
Google ↗
AI Mode ↗
————1x
of 1