Key Definitions

Question 1

Type II Error

Answer 1

False Negative
Accepting the null when the alternative is true.
Failing to reject the null when the alternative is true.

Question 2

Relative Scale Measurements

Answer 2

1. CIR
   2.IDR
2. OR

Relative Risk scale -1 to 1

Question 2

Type I Error

Answer 2

False Positive
Accepting the alternative when the null is true
Failing to accept the null when the alternative is false.

Question 3

CIR

Answer 3

a/a+b / c/c+d

This compares disease based on exposure!
The risk of disease in the exposed group is # times the risk in the unexposed group.
May include the words higher or lower.

Question 4

IDR

Answer 4

a/PTe / c/PTu
The rate of outcome in the exposed is # times the rate in the unexposed.
May include the words higher or lower.

Question 5

RR > 1

Answer 5

Positive association (risk factor)

Question 6

RR = 1

Answer 6

No association

Question 7

RR < 1

Answer 7

Negative association (protective factor)

Question 8

Odds Ratio

Answer 8

likelihood of a particular outcome = probability of event occurring/ probability of the event not occurring

Question 9

OR Cohort

Answer 9

The odds of [disease] among exposed is x times the odds of [disease] in the unexposed.

Question 10

OR Case-Control

Answer 10

The odds of [exposure] among [cases] is [X] times
the odds of [exposure] among [controls].

Question 11

OR matched

Answer 11

The odds of [exposure] among [cases] is [X] times
the odds of [exposure] among [controls].