Which term describes the percentage of patients correctly identified by a test overall?

The term that describes the percentage of patients correctly identified by a test overall is efficiency. Efficiency in the context of clinical testing refers to the ability of a test to accurately detect both the presence and absence of a condition among all tested individuals, representing the test's overall discriminatory power. It reflects how well a test not only identifies true positives (those with the condition) but also true negatives (those without the condition), giving a comprehensive view of a test's performance.

While specificity pertains to the ability of a test to correctly identify those without the disease (true negatives), and sensitivity measures its ability to identify those with the disease (true positives), efficiency encompasses both of these aspects across the entire population being tested. Prevalence, on the other hand, refers to how common a condition is within a specific population and does not assess the test's performance itself.