Information Bias

Question 1

DIFFERENTIAL MISCLASSIFICATION OF EXPOSURE

Answer 1

Proportion of subjects misclassified on exposure is different in each outcome group

Question 2

DIFFERENTIAL MISCLASSIFICATION OF OUTCOME

Answer 2

Proportion of subjects misclassified on outcome is different in each outcome group

Question 3

NON-DIFFERENTIAL MISCLASSIFICATION OF EXPOSURE

Answer 3

Proportion of subjects misclassified on exposure is same in each outcome group

Question 4

NON-DIFFERENTIAL MISCLASSIFICATION OF OUTCOME

Answer 4

Proportion of subjects misclassified on outcome is same in each outcome group

Question 5

RECALL BIAS

Answer 5

Occurs when study participants do not accurately or completely recall prior events of experiences

Question 6

REPORTING BIAS

Answer 6

Occurs when study participants purposely suppress or reveal information on a study variable because of social stigma

Question 7

INTERVIEWER BIAS

Answer 7

Occurs when interviewer solicits or interprets information differently between study subjects

Question 8

OBSERVER BIAS

Answer 8

Occurs when study personnel observe information differently from study participants

Question 9

DETECTION BIAS

Answer 9

Difference in diagnosis or ascertainment of study measures over time or between study participants

Question 10

SURVEILLANCE BIAS

Answer 10

Difference where one study group is followed more closely than the other; outcome identified more frequently in closely followed group