Social & Preventive Medicine Positive predictive value of a screening test is measured by- A True positive x 100 (True positive + False positive) B True negative x 100 (false positive + false negative) C True positive x 100/ (True positive + False negative) D True negative x 100 (True positive + False negative 💡 Explanation Positive predictive value of a screening test is measured by- ✓ Correct Answer: A. True positive x 100 (True positive + False positive)