Trade-offs between sensitivity and specificity US Medical PG Flashcards - Medical Study Cards
Master Trade-offs between sensitivity and specificity with OnCourse flashcards. These spaced repetition flashcards are designed for medical students preparing for NEET PG, USMLE Step 1, USMLE Step 2, MBBS exams, and other medical licensing examinations.
Trade-offs between sensitivity and specificity Flashcard Deck - 10 Cards
Flashcard 1: A high _____ test is useful for screening in diseases with low prevalence (sensitivity or specificity)
Answer: sensitivity
Flashcard 2: _____ is the consistency and reproducibility of a test
Answer: Precision (reliability)
Flashcard 3: A high _____ test is useful for confirmation after a positive screening test
Answer: specificity
Flashcard 4: Sensitivity values approaching 100% is desirable for ruling _____ disease (in or out)
Answer: OUT
Flashcard 5: Under Hardy-Weinberg conditions, what is the expected frequency of an X-linked recessive disease in males? Females?
Answer: males - q
females - q2 (if condition is survivable)
Flashcard 6: coefficient of determination (r2) (biostatistics)
Answer: measure of correlation
0 indicates no relationship
1 indicates perfect concordance
Flashcard 7: Pearson's correlation coefficient (r) (biostatistics)
Answer: measure of linear correlation
-1 is perfect inverse relationship
1 is perfect direct relationship
Flashcard 8: What is the Chi-square (X2) test used for? (biostatistics)
Answer: compare proportions of categorical outcomes between two groups (not comparison of means!)
Flashcard 9: Which parameters, sens/spec or PPV/NPV are affected by prevalence of the disease in the population?
Answer: PPV/NPV
Flashcard 10: PPV (biostatistics)
Answer: Probability that a person actually has disease given a positive test result.
Extra: PPV = TP/(TP+FP)
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