Changing the cutoff points for a disease – Biostats for the Step 2 CK exam
Many questions on the CK exam ask you to interpret graphs. A common question asks you about sensitivity and/or specificity when changing the cutoff point for a disease. The cutoff may be shifted left or right, thus changing the number of people who are tested both positive and negative for a disease. Proper understanding of this graph can help you get a couple extra points on your CK exam.