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Define epidemiology
largely concerned with disease prevention and therefore
with the succession of events which result in the exposure
of specific types of individual to specific types of
environment. Epidemiologists ID exposures and evaluate
associations with health, welfare, productivity and other
outcomes of interest
,what is the major difference between epidemiologists
and laboratory scientists?
epidemiologists study health and disease outcomes in
the real world (under field conditions)
what is the primary study design of epidemiology
observational
define inductive reasoning
process of making generalized inferences about
causation based on repeated observations
define deductive reasoning
process of inferring general law of nature exists and has
application in specific or local instance where a
hypothesis about a law of nature starts and observations
are made to challenge the law
, define what a cause is in epidemiology
a cause is any factor that produces a change in the
severity or frequency of the outcome
define the component-cause model
based on concepts of necessary and sufficient causes
developed by Rothman in 1976. Necessary cause is one
without which the disease CANNOT occur (the factor will
ALWAYS be present if the dz occurs). Sufficient cause
always producers the disease (if the factor is present, DZ
will follow). Component-cause is one of a NUMBER of
factors that in COMBINATION constitute a sufficient
cause. Factors may be present simultaneously or in
sequence.
define causal complements in the component-cause
model
additional components beyond the selected one that
form sufficient causes for the exposure factor