A5040175297- Radiation Dose and Imaging
- Advanced Radiotherapy Techniques
- Microscopic Colitis
- Medical Imaging Techniques and Applications
- Lymphoma Diagnosis and Treatment
- Homelessness and Social Issues
- Radiation Therapy and Dosimetry
- Esophageal and GI Pathology
- HIV, Drug Use, Sexual Risk
- Asthma and respiratory diseases
- Advanced X-ray and CT Imaging
- Retinal Imaging and Analysis
- Cardiac, Anesthesia and Surgical Outcomes
- Digital Radiography and Breast Imaging
- Inflammatory Bowel Disease
- Glaucoma and retinal disorders
- Radiation Effects and Dosimetry
- Balance, Gait, and Falls Prevention
- Intestinal Malrotation and Obstruction Disorders
- Cerebral Palsy and Movement Disorders
- Lung Cancer Treatments and Mutations
- Insect Utilization and Effects
- Multiple and Secondary Primary Cancers
- Thermal Regulation in Medicine
- Ear Surgery and Otitis Media
Université Laval
2014-2016
Centre hospitalier universitaire de Québec
2014-2015
Institut Universitaire de Cardiologie et de Pneumologie de Québec
2015
The University of Texas MD Anderson Cancer Center
2015
Standard Imaging (United States)
2015
Jewish General Hospital
1997-2013
McGill University
1996-2013
Jewish Hospital
2011
Université de Montréal
2011
Montreal Police Service
2002
Some authors argue that systematic reviews and meta-analyses of intervention studies should include only randomized controlled trials because the trial is a more valid study design for causal inference compared with observational design. However, review principal elements underlying this claim (randomization removes chance confounding, double-blind process minimizes biases caused by placebo effect) suggests both classes designs have strengths weaknesses, including information from may...
The association between the use of inhaled beta-agonists and risk death near-death from asthma has previously been reported. It was based on a nested case-control study 129 cases 655 control subjects selected cohort 12,301 users drugs followed during period 1980 through 1987. In this paper we examine question non-asthma mortality using data entire asthmatics. There were 46 134 deaths in cohort, for which there 47,842 person-years follow-up. overall rate 9.6 per 10,000 asthmatics year. This...
Abstract Objective There is increasing evidence in support of an association between systemic lupus erythematosus (SLE) and malignancy, but earlier studies the could not be quantified precisely. The present study was undertaken to ascertain incidence cancer SLE patients, compared with that general population. Methods We assembled a multisite (23 centers) international cohort patients diagnosed as having SLE. Patients at each center were linked regional tumor registries determine occurrence....
Early treatment with inhaled corticosteroids appears to improve clinical symptoms in asthma. Whether a first initiated the year following recognition of asthma can prevent major outcomes such as admission hospital has yet be studied.A case-control study nested within cohort 13,563 newly treated asthmatic subjects selected from databases Saskatchewan Health (1977-1993) was undertaken investigate effectiveness preventing admissions for Study were aged between five and 44 years at entry. First...
<h3>Objective:</h3> To estimate the prevalence of polymyositis and dermatomyositis using population-based administrative data, sensitivity case ascertainment approaches patient demographics these parameters. <h3>Methods:</h3> Cases were ascertained from Quebec physician billing hospitalisation databases (approximately 7.5 million beneficiaries). Three different definition algorithms compared, statistical methods also used that account for imperfect ascertainment, to generate estimates...
We aim to estimate HIV prevalence and associated risk factors among street youth in Montreal, Canada. conducted a one-year cross-sectional anonymous study 1995. recruited aged 13-25 years meeting specific criteria for itinerancy through the 20 major Montreal agencies. Participation included structured interview provision of an oral specimen testing. Among 909 subjects studied, 99.3% had been sexually active, 25.9% exchanged sex money, gifts, drugs, place sleep, or other things; 31.8%...
A cohort study designed to evaluate the carcinogenicity of treatment for Hodgkin's disease (HD) was conducted. This report describes 2,591 patients with HD diagnosed in 1940-75 and presents an analysis follow-up findings through 1978. Seventy-four second primary cancers (excluding basal cell squamous skin situ carcinomas cervix uteri) were observed 1 year or more after diagnosis HD, including 21 leukemias. Twenty leukemias occurred chemotherapy. The relative risk (RR) leukemia intensive...
Synopsis While spouse similarity for psychiatric morbidity has been the object of numerous studies, most these focused on clinical samples and, consequently, interpretation their results is limited by existence a selection bias. In this study, conducted sample 845 general population couples, significant was observed psychological distress and well-being, characterized marked symmetry in relation between spouses' scores. The sex differences many earlier studies would appear essentially to be...
A cohort study designed to evaluate the carcinogenicity of treatment for Hodgkin's disease (HD) was begun in 1976. This report describes 1,553 patients diagnosed with HD 1940–75 and presents an analysis follow-up findings through Twenty-seven cancers (excluding basal cell squamous carcinomas skin, trichoepitheliomas, situ cervix uteri) were observed 1 year or more after diagnosis HD, including 6 leukemias. The relative risk (RR) leukemia treated intensive chemotherapy without radiotherapy...
To characterize the low energy behavior of scintillating materials used in plastic scintillation detectors (PSDs), 3 PSDs were developed using polystyrene-based emitting different wavelengths. These exposed to National Institute Standards and Technology (NIST)-matched low-energy beams ranging from 20 kVp 250 kVp, (137)Cs (60)Co beams. The dose polystyrene was compared air measured by NIST-calibrated ionization chambers at same location. Analysis every beam quality spectrum extract parameters...
Abnormal fucosylation of cystic fibrosis mucin was previously shown using peroxidase conjugated lectins on ileal tissue sections. These abnormally fucosylated glycoproteins were investigated further monoclonal antibodies to fucosyl oligosaccharides based type 1 and 2 blood group precursor chains. The results this study, in fibrosis, negative, yet abnormal had been found lectin histochemistry. Using antibodies, lectins, appropriate enzymes, such as glycosyl hydrolases, it should be possible...
To determine the cost effectiveness of screening for glaucoma.Information on treatment efficacy, diagnostic methods, epidemiological characteristics glaucoma, and costs were determined from literature, administrative databases, experts. Scenarios with different frequency, age, participation in screening, compliance treatment, tests examined.The initial scenario comprised three-yearly subjects aged 40-79 by funduscopy tonometry, followed perimetry when abnormalities discovered. The assumption...
SUMMARY Varicella occurs at an older age in tropical compared to cold climates. Migrants from countries provide the opportunity gain insights into observed global differences varicella epidemiology. Severity of increases with thus, description risk factors for susceptibility will identify those who would benefit most vaccination. A total 1480 migrants, a mean 32 years, were recruited pre-vaccination period (2002–2004) Montreal, Canada. questionnaire was administered and serum antibodies...
The authors' objective was to systematically assess the performance of seven photodetectors used in plastic scintillation dosimetry. authors also propose some guidelines for selecting an appropriate detector a specific application.The (PSD) consisted 1-mm diameter, 10-mm long fiber (BCF-60), which optically coupled clear 10-m optical same diameter. A light-tight sheath covered both fibers and scintillator end sealed. connected one following photodetectors: two polychromatic cameras (one with...
Purpose: The authors applied 2D reference dosimetry protocol for dose measurements using XR‐QA radiochromic film model during diagnostic computed tomography (CT) examinations carried out on patients and humanoid Rando phantom. Methods: Response of GAFCHROMIC™ system was calibrated in terms Air‐Kerma air. Four most commonly used CT protocols were selected their scanner (GE Lightspeed VCT 64), covering three anatomical sites (head, chest, abdomen). For each protocol, 25 ongoing planned...
We estimated the prevalence of Chlamydia trachomatis and Neisseria gonorrhoeae genital tract infections among 302 Montreal street youth (223 boys) identified associated risk factors. Study participants, 14-25 years old (average 20.9 years), meeting specific criteria for homelessness, were recruited in agencies. Participation included a structured interview provision urine specimen. Among sexually active youth, ( n = 300) 30.0% had more than five heterosexual partners 13.0% at least one...
Preexisting computerized databases are potentially valuable sources of epidemiologic data. Since such infrequently created specifically for etiologic research, data may be available the exposure interest and, through record linkage, endpoint interest, but lacking potential confounders. Because size these databases, two-stage sampling is an efficient alternative to surveying entire study population confounder At stage 1, information on and disease status obtained population. Confounder...