Question

A concordance rate indicates: A. the percentage of relatives who exhibit the same disorder. B. the percentage of people with a given disorder who are currently receiving treatment. C. the prevalence of a given disorder in the general population. D. the rate of cure for a given disorder.

Short answer

A. The percentage of relatives who exhibit the same disorder. B. The percentage of people with a given disorder who are currently receiving treatment. C. The prevalence of a given disorder in the general population. D. The rate of cure for a given disorder. Answer: A. The percentage of relatives who exhibit the same disorder.

Step-by-step solution

Understand the Concept of Concordance Rate

A concordance rate is a statistical term used in twin and family studies to describe the probability that two related individuals will share the same genetic or behavioral trait or disorder. It is usually expressed as a percentage.

Analyze Each Option

Now, let's take a closer look at each of the given options to determine which one matches the definition of concordance rate: A. The percentage of relatives who exhibit the same disorder. This option is partly correct, as concordance rate does involve related individuals sharing the same trait or disorder. However, it is more specific than just "relatives" as it is usually used in twin and family studies. B. The percentage of people with a given disorder who are currently receiving treatment. This option is not correct, as it is related to treatment and does not match the definition of concordance rate. C. The prevalence of a given disorder in the general population. This option is not correct, as the prevalence of a disorder in the general population is a different concept and not related to concordance rate. D. The rate of cure for a given disorder. This option is not correct, as it is related to the rate of cure for a disorder and not the probability of related individuals sharing the same trait or disorder.

Select the Correct Option

Based on the analysis of each option, we can conclude that: Option A (the percentage of relatives who exhibit the same disorder) is the most accurate description of a concordance rate, even though it is not perfect. The correct answer is A.