<prompt> A city has a population of 10000 with 500 diabetic patients. A new diagnostic test gives true positive result in 350 patients and false positive result in 1900 patients. Which of the following isare true regarding the test ?Prevalence is 5Sensitivity is 70Specificity is 80All  <response>: Ans. is a i.e., Prevalence is 5; b i.e., Sensitivity is 70 c i.e., Specificity is 80 In this question : Total patients 500 diabetic patients True positive patients 350 Thus remaining 150 500-350 are false negative. 350 So, sensitivity of test 350150 70 Similarly, Total non-diseased are 9500 10000-500 Among these false positive are 1900 Thus remaining 7600 are ture negative 9500-1900 7600 So, specificity of test 80 9500 500 o Prevalance of disease x 100 5 10000 