Margaret A.Winker, MDIndividualAuthorPhil B.FontanarosaMD, Senior EditorsIndividualAuthor
To the Editor: Dr Schriger and
colleagues1 have done a major disservice by incorrectly
concluding that board-certified general radiologists are incapable of
identifying intracranial hemorrhage on cranial CT and therefore are
unable to determine eligibility for thrombolytic therapy.
Their sample of 36 board-certified general radiologists is flawed.
There is no documentation to indicate that those chosen to participate
represent an appropriate sample of the type of general radiologist that
would be responsible for interpreting emergency cranial CTs in most
clinical situations. Their data are therefore suspect, and the authors
are correct in stating that "our convenience sampling method is the
main threat to the external validity of the study." More than a
threat, this limitation destroys any credibility to their conclusion.
Stolz JL. Reducing Treatment Delay and Improving Diagnostic Accuracy for Patients With Acute Stroke. JAMA. 1999;281(1):31-34. doi:10-1001/pubs.JAMA-ISSN-0098-7484-281-1-jbk0106