Evidence grade: MODERATE — Supported by moderate evidence.
A biomarker's repeatability sets the floor for detectable change; most are deployed without established repeatability coefficients, so 'change' may be noise.
Consensus acquisition recommendations exist but repeatability across the real installed base is largely unquantified.
Multi-vendor test-retest (coffee-break) studies producing repeatability coefficients and minimal-detectable-change thresholds for each biomarker.
This is an educational research resource from Resonant Labs, not clinical advice. Evidence grades and controversies are summarized from the literature and may change as the field evolves.