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Review Question - QID 212363

Evaluating Diagnostic Tests Sensitivity, Specificity, PPV, NPV These 4 measures describe how well diagnostic tests capture the true presence or absence of disease  QID: 212363 (M2.OMB.18.4)
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QID 212363 (Type "212363" in App Search)
A new screening test utilizing a telemedicine approach to diagnosing diabetic retinopathy has been implemented in a diabetes clinic. An ophthalmologist’s exam was also performed on all patients as the gold standard for diagnosis. In a pilot study of 500 patients, the screening test detected the presence of diabetic retinopathy in 250 patients. An ophthalmologist exam confirmed a diagnosis of diabetic retinopathy in 200 patients who tested positive in the screening test, as well as 10 patients who tested negative in the screening test. What are the sensitivity, specificity, positive predictive value, and negative predictive value of the screening test?
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