This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Epidemiology, Subject name: Social & Preventive Medicine
[{'content': 'Predictive values of a screening test depends on \nSelect and explain. \nA. Prevalence, B. Sensitivity, C. Health worker, D. None of the above', 'role': 'user'}, {'content': 'Answer: A \nExplanation: In addition to sensitivity and specificity, the performance of a screening test is measured by its predictive value which reflects the diagnostic power of the test.The predictive accuracy depends upon sensitivity, specificity and disease prevalence.The more prevalent a disease is in a given population, the more accurate will be the predictive value of a positive screening test.Park 23e pg: 140', 'role': 'assistant'}]