ERIC: Ecologic Studies Flashcards Preview

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Flashcards in ERIC: Ecologic Studies Deck (4)
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1

Ecologic Study

a study where the unit of observation is a group, not separate individuals, for one or more study variables.

2

Ecologic fallacy

when you assume that because an exposure and outcome occurred in the group, it must also occur in individuals

3

Confounding bias

1 of 2 types of bias in ecologic studies

a mixing of the effects of other risk factors with the exposure of interest.

4

Cross Level bias

1 of 2 types of bias in ecologic studies

when the confounding factor is associated with the background rate of disease differentially across groups.