The agreement ratio between people diagnosed as having a disorder and their relatives is defined as the concordance rate.
Concordance rate is the likelihood or tendency that people that are blood related or people who shared the same heredity gene will be diagnosed with the same disorder or disease.
Example if a mother or father has diagnosed of having a disease such as cancer as cancer can be inherit their is the probability of the child to as well be diagnosed with same disease reason being that they shared the same gene or traits with their parents.
Inconclusion the agreement ratio between people diagnosed as having a disorder and their relatives is defined as the concordance rate.
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