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McNemar's test to analyze a matched case-control study

McNemar's test is used to compare paired proportions. It can be used to analyze retrospective case-control studies, where each case is matched to a particular control. Or it can be used to analyze experimental studies, where the two treatments are given to matched subjects. Read an example with explanation.

Risk Factor?
Control Case # of pairs
No Yes
Yes No
Yes Yes
No No

Use McNemar's test (and this calculator) only when you are analyzing matched pairs. Each value you enter above represents a number of PAIRS. The total number of subjects in the study is twice the total of the values you enter above.
Note that the calculations are based entirely on the first two numbers you enter. Enter the remaining two numbers in order to document your full results.