Q: 7
ACME Intervention Co. is testing a new carotid artery stent in patients with coronary artery disease,
in hopes of proving superiority over the current standard of care. After a subject signs consent, the
surgeon enrolls the patient and retrieves information on which stent to use, but the surgeon does
not share this information with the subject. Yesterday, the surgeon was instructed to use the control
stent. Today, the surgeon has completed two surgeries: the first one the surgeon was instructed to
use the control stent; the second one the surgeon was instructed to use the test stent. In what type
of trial is the surgeon participating?
Options
Discussion
Check the official CCDM exam glossary or even some practice questions for single-blind trial definitions. C
C or D? Pretty sure it's C, since only the patient is blinded here and the surgeon knows which stent is used. D often tricks people, but that's when each subject gets both treatments (not the case from this description). Disagree?
Not A here, it's C. The surgeon knows which stent is being used so double-blind is a trap.
I’d say C, saw a really similar setup in a practice set. Only the subject is blinded here so single-blind fits, not double-blind.
A or D here
C , check the CCDM official guide or sample exams for single-blind definitions.
C tbh, unless the protocol ever assigns both stents to the same patient later which'd flip this to D.
Worth looking up single-blind vs cross-over study definitions in the official guide or practice tests.
C not D. D's a common trap since each subject isn't getting both treatments.
C
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