What is a difficulty in relying on referent values or cutoffs in converting a numerical test results into a yes-or-no clinical diagnosis?
A) Test results can fall beyond the cutoff values, leaving the diagnostic question unanswered.
B) The cutoff value is patient-specific and must be calculated for each individual patient.
C) The value considered to be the cutoff is variable depending on the prescribing physician.
D) There is a range of test result values that are shared between those with and without the condition.
Question 2
Which of the following variables has a significant effect on the predictive value of a test?
A) The doctor diagnosing the condition
B) The prevalence of the condition
C) The severity of the condition
D) The volume of the patient's sample tested
Graphic display of hypothetical results of a predator removal experiment.
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