Social & Preventive Medicine For the diagnosis of SLE, 6 tests are done of which 4 came as positive and 2 negative. For the confirmation the following must be known: A Prior probability of having the disease, Sensitivity & specificity of each test B Incidence of SLE, predictive value of the tests C Incidence & prevalence of SLE D Relative risk of the patient 💡 Explanation For the diagnosis of SLE, 6 tests are done of which 4 came as positive and 2 negative. For the confirmation the following must be known: ✓ Correct Answer: A. Prior probability of having the disease, Sensitivity & specificity of each test