Term
|
Definition
| a difference between the treatment and control groups, which affects the responses being studied. |
|
|
Term
|
Definition
| is a third variable, associated with exposure and with disease. |
|
|
Term
| In an observational study |
|
Definition
| the investigators do not assign the subject to treatment or control. The subjects with the condition are being studied and are called the treatment group. (i.e smokers) The other subjects are the controls. (i.e non-smokers) |
|
|
Term
|
Definition
| when one thing is linked to another. Can also point to causation: if exposure causes disease. But it does not prove causatin. |
|
|
Term
| Observation studies can be quite misleading about |
|
Definition
| cause and effect relationship because of confounding. |
|
|
