The term “external comparison group” is most relevant tothe calculation of the
| a. |
The Standardized Mortality Ratio in a retrospective cohortstudy |
|
| b. |
The way to get a control group for a case series study |
|
| c. |
The comparison of exposed and non-exposed in a prospectivecohort study |
|
| d. |
The independent variable in an ecologic study |
|
| e. |
All of the above |
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