Epidemiology Review III

An event in time that effects the outcome of your results (help to avoid randomization).

Randomized control trials are an epidemiological experiment in which subjects in a population are randomly allocated into groups, usually called study and control groups.

Third variable that related to the exposure and the outcome.

Third variable that related to the exposure and the outcome.

An event in time that effects the outcome of your results (help to avoid randomization).

The gold standard helps to describe a definitive diagnosis that has been determined by biopsy, surgery, autopsy, or other method and has been accepted as the standard.

People get older and wiser as time goes on (randomization).

People just get better at taking tests over time.

The gold standard helps to describe a definitive diagnosis that has been determined by biopsy, surgery, autopsy, or other method and has been accepted as the standard.

People get older and wiser as time goes on (randomization).

It is the best because if the sensitivity test correctly identifies all potential cases as either negative or positive.

People just get better at taking tests over time.

Using two or more different instruments to observe an outcome (randomization).

More people with certain characteristics then another. experimental group will leak information to the control group.

more people with certain characteristics then another.

experimental group will leak information to the control group.

More people with certain characteristics then another.

Using two or more different instruments to observe an outcome (randomization).

experimental group will leak information to the control group.

More people with certain characteristics then another.

Drop outs, lose people, or they die. This can be an issue if there is a systematic difference between the exposed and the unexposed.

Drop outs, lose people, or they die. This can be an issue if there is a systematic difference between the exposed and the unexposed.

experimental group will leak information to the control group.

Subjects improve their outcome because they are in a study, people will feel special because they are in the study. The effect will be an effect in treatment.

Belief that treatment will improve for them (subjects).

Subjects improve their outcome because they are in a study, people will feel special because they are in the study. The effect will be an effect in treatment.

People tend to answer questions the way that they believe the researcher would want them to. In order for more attention they give answers that are beneficial to the researcher.

Belief that treatment will improve for them (subjects).

People tend to answer questions the way that they believe the researcher would want them to. In order for more attention they give answers that are beneficial to the researcher.

Subjects improve their outcome because they are in a study, people will feel special because they are in the study. The effect will be an effect in treatment.

Subjects improve their outcome because they are in a study, people will feel special because they are in the study. The effect will be an effect in treatment.

People tend to answer questions the way that they believe the researcher would want them to. In order for more attention they give answers that are beneficial to the researcher. people tend to answer questions the way that they believe the researcher would want them to. In order for more attention they give answers that are beneficial to the researcher.

Social Desirability