Balance
$0.00
Account
HSA
Selected
A
Grade A — Gold Standard
Multi-RCT · 90–100% confidence
B
Grade B — Strong Evidence
RCT / Large Cohort · 75–89% confidence
C
Grade C — Emerging
Pilot study / Mechanistic · 50–74% confidence
D
Grade D — Observational
Case reports / Expert opinion · <50% confidence