This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Miscellaneous, Subject name: Social & Preventive Medicine
Test indicates that it has a sensitivity of 90%. It means that 
Select and explain. 
A. 90% of the individuals tested are true positive, B. 10% are true positive, C. 90% of the individuals tested are false negatives, D. 10% are true negatives
A: 90% of the individuals tested are true positive
Answer: A: 90% of the individuals tested are true positive 
Explanation: (A) 90% of the individuals tested are true positive # Term Sensitivity was introduced by Yerushalmy in 1940s as a statistical index of diagnostic accuracy. It has been defined as the ability of a test to identify correctly all those who have the disease, that is "true positive".> A 90 per cent sensitivity means that 90 per cent of the diseased people screened by the test will give a "true positive" result and the remaining 10 per cent a "false negative" result.