This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Unknown
[{'content': 'The usefulness of a ‘screening test’ in a community depends on its? \nSelect and explain. \nA. Sensitivity, B. Specificity, C. Reliability, D. Predicitive value', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Predictive value of a test signifies diagnostic power of the test.\nattribute of an idea screening test is its repeatability or reliability or reproducibility.\nSensitivity has been defined as the ability of the test to identify correctly all those who have the disease, that is true positive (Hence determines the usefulness of the screening test.', 'role': 'assistant'}]