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Two experiments were conducted to explore the potential effects of aging upon the perception and discrimination of speed. In the first experiment, speed difference thresholds were obtained for younger and older observers for a variety of standard speeds ranging from slow to fast. The second experiment was designed to evaluate the observers' ability to(More)
Two experiments examined how observers' ability to perceive biological motion changes with increasing age. The observers discriminated among kinetic figures, depicting walking, jogging, and skipping. The direction, duration, and temporal correspondence of the motions were manipulated. Quantitative differences occurred between the recognition performances of(More)
BACKGROUND Although biphasic defibrillation waveforms appear to be superior to monophasic waveforms in terminating VF, their relative benefits in out-of-hospital resuscitation are incompletely understood. Prior comparisons of defibrillation waveform efficacy in out-of-hospital cardiac arrest (OHCA) are confined to patients presenting in a shockable rhythm(More)
BACKGROUND Although secondary infections are recognized as a cause of morbidity and mortality in seasonal influenza, their frequency, characteristics, and associated clinical outcomes in 2009 influenza A(H1N1) (A[H1N1])-related critical illness are unknown. METHODS In a prospective cohort of adult patients admitted to Canadian ICUs with influenza A(H1N1)(More)
BACKGROUND Resuscitation research has been allowed to proceed using waiver of consent when compliance with guidelines is assured. In these circumstances, institutional review boards (IRBs) may request notification of enrolled patients. OBJECTIVES To describe the notification process developed with IRB feedback and implemented in two out-of-hospital(More)
OBJECTIVE To evaluate the feasibility of a prehospital randomized controlled trial comparing transcutaneous pacing (TCP) with dopamine for unstable bradycardia. METHODS Unstable bradycardic patients who failed to respond to a fluid bolus and up to 3mg atropine were enrolled. The intervention was dopamine or TCP with crossover to dopamine if TCP failed.(More)
The purpose of this study is to assess sexual function among patients with clinically localized prostate cancer referred for radiotherapy and to prospectively evaluate the effect of radiotherapy on sexual function, using the Brief Sexual Function Inventory (BSFI). A descriptive study, approved by the local research ethics committee, was prospectively(More)
BACKGROUND Canada's pandemic H1N1 influenza A (pH1N1) outbreak led to a high burden of critical illness. Our objective was to describe the incidence of AKI (acute kidney injury) in these patients and risk factors for AKI, renal replacement therapy (RRT), and mortality. METHODS From a prospective cohort of critically ill adults with confirmed or probable(More)
Information quality (IQ) problems can have severe consequences in the health care sector. Since its inception, the Canadian Institute for Health Information (CIHI) has recognized the importance of information quality and has implemented a new method designed to evaluate the data quality of the numerous CIHI data holdings. The goal of evaluation is to(More)