This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Sensitivity, Specificity, PPV, NPV, Subject name: Social & Preventive Medicine
Taking diabetes as our example,if the cut-off point for blood glucose is lowered to detect Diabetes (say less than 120 mg per cent): 
Select and explain. 
A. Sensitivity of the test is increased, B. Specificity of the test is increased, C. Predictive accuracy of the test is decreased, D. None of the above
A: Sensitivity of the test is increased
Answer: A: Sensitivity of the test is increased 
Explanation: The sensitivity of the test is increased as we lower the cut off. The no. of False Positives will also increase. This Increase in sensitivity occurs at Expense of Specificity. i.e Specificity will decrease ( As sensitivity and specificity are inversely related to each other.so if Sensitivity Increases ---> Specificity Decreases and Vice Versa) Extra edge: - As test's false negative value increases, sensitivity decreases.