Multi-test algorithms US Medical PG Flashcards - Medical Study Cards
Master Multi-test algorithms 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.
Multi-test algorithms 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 probability that when the disease is absent, the test is negative
Answer: Specificity
Flashcard 3: _____ is the probability that when the test is positive, the disease is present
Answer: Positive predictive value
Flashcard 4: _____ is the probability that when the test is negative, the disease is absent
Answer: Negative predictive value
Flashcard 5: Negative LR < _____ is an indicator of a very useful diagnostic test
Answer: 0.1
Flashcard 6: 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 7: coefficient of determination (r2) (biostatistics)
Answer: measure of correlation
0 indicates no relationship
1 indicates perfect concordance
Flashcard 8: Pearson's correlation coefficient (r) (biostatistics)
Answer: measure of linear correlation
-1 is perfect inverse relationship
1 is perfect direct relationship
Flashcard 9: What is the Chi-square (X2) test used for? (biostatistics)
Answer: compare proportions of categorical outcomes between two groups (not comparison of means!)
Flashcard 10: Which parameters, sens/spec or PPV/NPV are affected by prevalence of the disease in the population?
Answer: PPV/NPV
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