'Sensitivity' of a test is -

It has been defined as the ability of the test to identify correctly all those who have the disease, true positive. A 90 percent sensitivity means that 90 percent of the diseased screened by the test will give a "true positive " result and the remaining 10 percent a "false negative " result. Ref: 25th edition, Park's Textbook of Preventive and Social Medicine, Page no. 152