USMLE Question of the Week

Statistics In Diagnostics for USMLE

In Episode 6 of Med School Question of the Week for USMLE, Luke Maxfield, MedSchoolCoach expert tutor, answers this medical school question:

A physician is in the process of developing a serologic test to determine the presence of sarcoidosis. While evaluating this study serum levels of Anti-X- protein will be measured. The presence of Anti-x-protein will be compared to tissue biopsies demonstrating non-caseating granulomas as the control. 200 patients were recruited and 120 had positive biopsy results. Anti-X protein was found in 80 patients with sarcoidosis and was positive in 15 patients without the disease. What is the specificity of the test?

  • 0.67
  • 0.84
  • 0.62
  • 0.81
  • 2.21
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Luke Maxfield

Luke obtained his B.S. from the University of Colorado while working at the University of Colorado Anschutz Medical Campus department of pathology as a student researcher. He completed studies at the University of Tennessee at Chattanooga and is a current dermatology resident. Luke scored in the 99th percentile on his COMLEX exams.

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