Science1984United Stateshigh confidence

The Behavioral Risk Factor Surveillance System (BRFSS), a state-based telephone health survey, began in 1984 in 15 states.

Notes on verification

Confirmed by a contemporaneous 1986 MMWR report, current CDC BRFSS documentation, peer-reviewed literature, and state health department records; no contradicting sources found. [tier=silver indep_score=0.925 clusters=2 claim_tier=everyday | framework convergence=partial on CDC's own BRFSS administrative/historical records, but corroborated by an independent contemporaneous 1986 MMWR publication and academic citations of it (upstreams: CDC BRFSS program records, 1986 MMWR report (CDC)) — publishers independent, evidence may not be | kind=empirical eligibility=high]

Sources