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تعداد نتایج: 169164 فیلتر نتایج به سال:
OBJECTIVE This observational study examined the proportion of family physicians continuing to perform deliveries from 2003-2010. METHODS Data were collected annually from the same census questionnaire completed by family physicians who passed their recertification examination. Aggregated responses began in 2003 when data first became available electronically and ended in 2009 before recertifi...
BACKGROUND Hospitals have difficulty justifying the expense of maintaining trauma centers without strong evidence of their effectiveness. To address this gap, we examined differences in mortality between level 1 trauma centers and hospitals without a trauma center (non-trauma centers). METHODS Mortality outcomes were compared among patients treated in 18 hospitals with a level 1 trauma center...
We evaluate the impact of climate change on stream flow in the Upper Mississippi River Basin (UMRB) by using a regional climate model (RCM) coupled with a hydrologic model, the Soil and Water Assessment Tool (SWAT). The SWAT model was calibrated and validated against measured stream flow data using observed weather data and inputs from the Environmental Protection Agency’s BASINS (Better Assess...
Students' attitudes toward caries prevention can impact their receptivity to training and subsequent involvement in preventive services in their future practices. The aim of this study was to evaluate dental students' opinions and knowledge regarding caries management and prevention at the University of Florida College of Dentistry. A twenty-six-item written survey instrument was administered t...
BACKGROUND The accuracy of multidetector computed tomographic angiography (CTA) for the diagnosis of acute pulmonary embolism has not been determined conclusively. METHODS The Prospective Investigation of Pulmonary Embolism Diagnosis II trial was a prospective, multicenter investigation of the accuracy of multidetector CTA alone and combined with venous-phase imaging (CTA-CTV) for the diagnos...
The performance characteristics of assays is reported for thyroxine (T4), triiodothyronine (T3), and T3-uptake (T3U) using the GAMMAFLOTM Automated Assay System. A comparison of calculated free thyroxine index (FTI) values is also presented. This automated radioimmunoassay (RIA) system utilizes a combination of continuous-flow methodology and chromatographic separation techniques. The T4 assay ...
To determine if paced cycle length-dependent changes in the QRS duration correlate with the change in ventricular tachycardia (VT) cycle length after procainamide, we measured the QRS duration during sinus rhythm and during right ventricular pacing before and after procainamide (mean concentration, 9.9 micrograms/ml) in 18 patients with morphologically identical VT induced at both study periods...
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