Similar term(s): confounder, confounding variable.
A confounding factor in a study is a variable which is related to one or more
of the variables defined in a study. A confounding factor may mask an actual
association or falsely demonstrate an apparent association between the study
variables where no real association between them exists. If confounding factors
are not measured and considered, bias may result in the conclusion of the study.
Bias - Epidemiological studies
Español: Factores de confusión