This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Screening, Subject name: Social & Preventive Medicine
Diagnostic power of the test is reflected by 
Select and explain. 
A. Sensitivity, B. Specificity, C. Predictive value, D. Population Attributable risk
C: Predictive value
Answer: C: Predictive value 
Explanation: 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. Park 23e pg: 140