Duncan Mackey

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OBJECTIVE To measure the sensitivity of modern third generation computed tomography in emergency patients being evaluated for possible subarachnoid haemorrhage, especially when carried out within six hours of headache onset. DESIGN Prospective cohort study. SETTING 11 tertiary care emergency departments across Canada, 2000-9. PARTICIPANTS(More)
IMPORTANCE Three clinical decision rules were previously derived to identify patients with headache requiring investigations to rule out subarachnoid hemorrhage. OBJECTIVE To assess the accuracy, reliability, acceptability, and potential refinement (ie, to improve sensitivity or specificity) of these rules in a new cohort of patients with headache. (More)
OBJECTIVES This study was designed to determine the prevalence of HIV and hepatitis C virus (HCV) in a specific population, and to distinguish between known and previously unrecognized infections in the emergency department (ED) setting. METHODS Consecutive patients aged 15 to 54 years who had presented to the EDs of 2 urban hospitals during a 6-week(More)
UNLABELLED The diagnostic probability of pulmonary embolic disease is based on the recognition of unmatched segmental perfusion defects. Although interobserver and intraobserver reproducibility have been studied, accuracy has been an elusive goal due to the lack of a gold standard. We investigated the accuracy and reproducibility of reporting in a virtual(More)
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