Question

A new screening test for colon cancer is developed. The screening test is evaluated by comparing results of 500 patient MRI results (in this case, considered the “gold standard” or confirming diagnostic tool). Of the 264 people who had a positive result on the new test, 211 were confirmed to have the disease by the MRI. Of the 236 people who had a negative result on the test, 97 were confirmed to have the disease by the MRI.

Please calculate the sensitivity                             [ Select ]                       ["Approximately 68.5%", "Approximately 72.4%", "Approximately 79.9%", "Approximately 58.9%", "None of the answers listed here are correct."]      

Please calculate the positive predictive value                            [ Select ]                       ["Approximately 68.5%", "Approximately 72.4%", "Approximately 79.9%", "Approximately 58.9%", "None of the answers listed here are correct."]      

Answer 1

The sensitivity is =68.5%

The posetive predictive value is= 79.9%

Explanations attached.

Thank you, hope i cleared your doubt.

ise seNon- Diseae ve Posetive 1 (Number) CTustve False tve 264 tola 236 53 -ve Negative | 97 (Nuumben) false eTuue Negtive 139 19 S b tada Disease X100 tuutve +false tve =68.5 - all 97+211 = 68.5 tve | predictive value = True tve False-tve