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False negative


A test result in which the test is negative (for example, a pregnancy test finds no sign of pregnancy) but the event is actually there (the woman is pregnant) also called a 'miss'.

False negative rate

The proportion of negative tests among people with the disease of the condition. It is typically expressed as a conditional probability or a percentage. For instance, mammography screening has a false negative rate of 5 to 20% depending on age, that is, 5 to 20% of women with breast cancer receive a negative test result. The false negative rate and the sensitivity (hit rate) of a test add up to 100%. The false negative rate and the false positive rate are dependent: to decrease one is to increase the other.