Technical Information and Data
BRFSS POLICY MEMO 93.3
POLICY ON THE MODIFICATION OF THE ANNUAL CORE INSTRUMENT
The fixed/rotating core instrument distributed for each year
is to be used as provided. Substantial change (e.g., changing the wording or
the placement of questions, or inserting numerous state-added questions in
the core) must be (1) supported by solid scientific evidence (from current
survey literature or from an experimental trial) that demonstrates the
changes do not affect the quality of core data nor increase total survey
error, and (2) agreed upon in consultation with BSB.
Exceptions are allowable for the limited insertion of
state-added questions in the core. These exceptions should be agreed upon in
consultation with BSB based upon the following criteria:
The topic of the state-added question(s) is directly
related to a question topic in the fixed/rotating core.
The nature or number of state-added questions is such that
they would not be functional as a set of follow-up questions asked after
the core and modules.
It is reasonably likely that the quality of the data
obtained from the state-added question(s) will be lower if the question(s)
are not inserted in the core.
- It is reasonably unlikely that the quality of the data obtained from
core questions will be lower due to the insertion of the state-added