Table 2: Test Results Diabetic Not Diabetic Positive to urine test, negative to blood 7 3 Positive to blood test, negative to urine 23 11 Positive to both tests 45 7 Negative to both tests 124 7,620 ТОTAL 199 7,641 a. How do the sensitivity or specificity of each combination of the tests change when compared with single test? b. assuming you are the harried director of the diabetes screening program, which test or combination of tests would you prefer to use?

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