ERIC: Ecologic Studies

Question 1

Ecologic Study

Answer 1

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

Question 2

Ecologic fallacy

Answer 2

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

Question 3

Confounding bias

Answer 3

1 of 2 types of bias in ecologic studies

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

Question 4

Cross Level bias

Answer 4

1 of 2 types of bias in ecologic studies

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