PHC 6001 Ch. 11 Confounding- Questions and Answers 100% Verified
Terms in this set (18)
Which of the following can be thought of confounding
as a failure of the comparison group to
reflect the counterfactual experience of
the exposed group?
systematic difference difference b/w
groups being compared that distorts the
true association b/w an exposure and dz;
an *inherent characteristic of the
population
-occurs when the risk of dz in the
unexposed group does not equal the risk
of dz in the exposed group had they been
unexposed which means that the
difference in dz risk b/w the exposed and
unexposed is due to factors other than
just the exposure
1. experimental and cohort: occurs Confounding Sources
whenthe exposed and unexposed groups
differ by more than just the exposure, they
differ by a third variable
2. case control: occurs when cases and
controls have different characteristics
-results in distortion of the true association confounding effects
between E and D. Can bias toward or away
from null; can be adjusted for (or fixed) ...to
a point
-"mixing of effects" because the estimate of
the effect of exposure on dz is distored b/c
it is mixed with the effect of other factors
associated with the exposure and the
disease. Sometimes called the "third
variable" problem.
Terms in this set (18)
Which of the following can be thought of confounding
as a failure of the comparison group to
reflect the counterfactual experience of
the exposed group?
systematic difference difference b/w
groups being compared that distorts the
true association b/w an exposure and dz;
an *inherent characteristic of the
population
-occurs when the risk of dz in the
unexposed group does not equal the risk
of dz in the exposed group had they been
unexposed which means that the
difference in dz risk b/w the exposed and
unexposed is due to factors other than
just the exposure
1. experimental and cohort: occurs Confounding Sources
whenthe exposed and unexposed groups
differ by more than just the exposure, they
differ by a third variable
2. case control: occurs when cases and
controls have different characteristics
-results in distortion of the true association confounding effects
between E and D. Can bias toward or away
from null; can be adjusted for (or fixed) ...to
a point
-"mixing of effects" because the estimate of
the effect of exposure on dz is distored b/c
it is mixed with the effect of other factors
associated with the exposure and the
disease. Sometimes called the "third
variable" problem.
