Read by QxMD icon Read


Shalini Desai, Michelle E Policarpio, Kenney Wong, Jonathan Gubbay, Jill Fediurek, Shelley Deeks
BACKGROUND: In Ontario, pneumococcal conjugate vaccines (PCVs) have been sequentially introduced into the publicly funded childhood vaccination program since 2005. A 23-valent polysaccharide pneumococcal vaccine (PPV23) has been routinely recommended for adults aged 65 years and older since 1996. To determine the effect of herd immunity, we examined the epidemiology of invasive pneumococcal disease in adults aged 65 years and older. METHODS: Invasive pneumococcal disease is a provincially reportable disease...
July 2016: CMAJ Open
Suzanne Biro, Dave Barber, Tyler Williamson, Rachael Morkem, Shahriar Khan, Ian Janssen
BACKGROUND: Population monitoring and surveillance of objectively measured child weight data in Canada is limited to national surveys with poor regional applicability, and no healthy weight data are available for children less than 2 years of age. We aimed to determine the prevalence of childhood overweight and obesity using objective measures derived from primary care electronic medical records. METHODS: Observational data included all height and weight records for children less than 20 years of age, between 2004 and 2013, from 3 Ontario primary care research networks...
July 2016: CMAJ Open
Wilson Kwong, Thomas Krahn, Ann Cleland, Janet Gordon, Wendy Wobeser
BACKGROUND: Current Canadian guidelines suggest that neonatal Bacille Calmette-Guérin (BCG) vaccination does not result in false-positive tuberculosis (TB) skin tests, despite a growing body of evidence that interferon-γ release assays may be a more specific alternative in identifying latent tuberculosis infections in vaccinated populations. We set out to evaluate the relationship between TB skin tests and interferon-γ release assays in patients who previously received neonatal BCG vaccine...
July 2016: CMAJ Open
Martin Dawes, Martin N Aloise, J Sidney Ang, Pieter Cullis, Diana Dawes, Robert Fraser, Gideon Liknaitzky, Andrea Paterson, Paul Stanley, Adriana Suarez-Gonzalez, Hagit Katzov-Eckert
BACKGROUND: Inappropriate prescribing increases patient illness and death owing to adverse drug events. The inclusion of genetic information into primary care medication practices is one solution. Our aim was to assess the ability to obtain and genotype saliva samples and to determine the levels of use of a decision support tool that creates medication options adjusted for patient characteristics, drug-drug interactions and pharmacogenetics. METHODS: We conducted a cohort study in 6 primary care settings (5 family practices and 1 pharmacy), enrolling 191 adults with at least 1 of 10 common diseases...
July 2016: CMAJ Open
Paula J Robson, Nathan M Solbak, Tiffany R Haig, Heather K Whelan, Jennifer E Vena, Alianu K Akawung, William K Rosner, Darren R Brenner, Linda S Cook, Ilona Csizmadi, Karen A Kopciuk, S Elizabeth McGregor, Christine M Friedenreich
BACKGROUND: Prospective cohorts have the potential to support multifactorial, health-related research, particularly if they are drawn from the general population, incorporate active and passive follow-up and permission is obtained to allow access by researchers to data repositories. This paper describes Phase I of the Alberta's Tomorrow Project cohort, a broad-based research platform designed to support investigations into factors that influence cancer and chronic disease risk. METHODS: Adults aged 35-69 years living in Alberta, Canada, with no previous cancer diagnosis other than nonmelanoma skin cancer were recruited to the project by telephone-based random digit dialling...
July 2016: CMAJ Open
Faiz Ahmad Khan, Greg J Fox, Robyn S Lee, Mylene Riva, Andrea Benedetti, Jean-François Proulx, Shelley Jung, Karen Hornby, Marcel A Behr, Dick Menzies
BACKGROUND: Between November 2011 and November 2012, an Inuit village in Nunavik, Quebec experienced a surge in the occurrence of active TB; contact investigations showed that TB infection was highly prevalent (62.6%), particularly among those over age 14 years (78.8%). A nested case-control study showed that nutritional inadequacy was associated with acquisition of infection but not progression to disease. We performed a study to determine whether characteristics of one's dwelling were associated with 1) acquisition of newly diagnosed TB infection and 2) progression to confirmed or probable disease among those with TB infection...
July 2016: CMAJ Open
Ahmad Elnahas, Timothy D Jackson, Allan Okrainec, Peter C Austin, Chaim M Bell, David R Urbach
BACKGROUND: In 2009, the Ontario Bariatric Network was established to address the exploding demand by Ontario residents for bariatric surgery services outside Canada. We compared the use of postoperative hospital services between out-of-country surgery recipients and patients within the Ontario Bariatric Network. METHODS: We conducted a population-based, comparative study using administrative data held at the Institute for Clinical Evaluative Sciences. We included Ontario residents who underwent bariatric surgery between 2007 and 2012 either outside the country or at one of the Ontario Bariatric Network's designated centres of excellence...
July 2016: CMAJ Open
Sarah A Buchan, Jeffrey C Kwong
BACKGROUND: Influenza immunization coverage among Canadian health care personnel remains below national targets. Targeting this group is of particular importance given their elevated risk of influenza infection, role in transmission and influence on patients' immunization status. We examined influenza immunization coverage in health care personnel in Canada, reasons for not being immunized and the impact of "vaccinate-or-mask" influenza prevention policies. METHODS: In this national cross-sectional study, we pooled data from the 2007 to 2014 cycles of the Canadian Community Health Survey and restricted it to respondents who reported a health care occupation...
July 2016: CMAJ Open
Anne Grundy, Christine M Friedenreich, Abbey E Poirier, Farah Khandwala, Darren R Brenner
BACKGROUND: Previous research to estimate population attributable risks for cancer in Alberta has been limited. Attributable burden estimates are important for planning and implementing population-based cancer prevention strategies. This article describes a methodologic framework to estimate the number of incident cancers attributable to modifiable lifestyle and environmental risk factors in Alberta. METHODS: We estimated population attributable risks for cancer for exposures to 24 established cancer risk factors including tobacco consumption and environmental tobacco exposure, environmental factors, infectious agents, hormone therapies, dietary intake, obesity and physical inactivity...
July 2016: CMAJ Open
Kevin L Schwartz, Nathaniel Jembere, Michael A Campitelli, Sarah A Buchan, Hannah Chung, Jeffrey C Kwong
BACKGROUND: Owing to the absence of a vaccination registry in Ontario, administrative data are currently the best available source to determine population-based individual-level influenza vaccination status. Our objective was to validate physician billing claims for influenza vaccination in the Ontario Health Insurance Plan database against the Canadian Community Health Survey. METHODS: We used self-reported seasonal influenza vaccination status of Ontario residents surveyed between 2007 and 2009 as the reference standard...
July 2016: CMAJ Open
Karen K Y Koo, Karen Choong, Deborah J Cook, Margaret Herridge, Anastasia Newman, Vincent Lo, Gordon Guyatt, Fran Priestap, Eileen Campbell, Karen E A Burns, FranÇois Lamontagne, Maureen O Meade
BACKGROUND: The promotion of early mobilization following critical illness is tempered by national reports of patient and institutional barriers to this approach. We carried out a survey to assess current knowledge, perceptions and practices of Canadian physicians and physiotherapists with respect to acquired weakness and early mobilization in adults in the intensive care unit (ICU). METHODS: We conducted a cross-sectional, self-administered postal survey among critical care physicians and physiotherapists in all 46 academic ICUs in Canada in 2011-2012...
July 2016: CMAJ Open
Neil M Goldenberg, Benjamin E Steinberg, James T Rutka, Robert Chen, Val Cabral, Norman D Rosenblum, Andras Kapus, Warren L Lee
BACKGROUND: Physicians have traditionally been at the forefront of medical research, bringing clinical questions to the laboratory and returning with ideas for treatment. However, we have anecdotally observed a decline in the popularity of basic science research among trainees. We hypothesized that fewer resident physicians have been pursuing basic science research training over time. METHODS: We examined records from residents in the Surgeon-Scientist and Clinician-Investigator programs at the University of Toronto (1987-2016)...
July 2016: CMAJ Open
Charles Nadeau, Laurence Letarte, Ramona Fratu, E Owen D Waygood, Alexandre Lebel
BACKGROUND: The aim of this study was to explore the population-wide distribution in the practice of leisure-time physical activity among Canadian youth and how physical activity level is influenced by contextual features of the environment. METHODS: We studied the self-reported leisure-time physical activity of 54 832 Canadians aged 12 to 17 years. Observations were structured according to a 4-level geographic hierarchy. The outcome studied was a dichotomous indicator that referred to achieving (or not) the recommended daily level of leisure-time physical activity...
July 2016: CMAJ Open
Michel Landry, Nadia Veilleux, Julie-Eve Arseneault, Saneea Abboud, André Barrieau, Mathieu Bélanger
BACKGROUND: Methadone maintenance treatment programs implemented in Aboriginal communities have proven to be beneficial for the control of opioid addiction and its associated consequences, but the perceptions and opinions of different community members about these programs remain elusive. The goal of this study was to determine the perceptions of members of a First Nation community in New Brunswick, Canada, on the implementation of a methadone maintenance treatment program and its effects on the community...
July 2016: CMAJ Open
Kimberly Rose P Singian, Morgan Price, Vicky Bungay, Sabrina T Wong
BACKGROUND: Parkinson disease is a complex neurodegenerative disorder, and a comorbidity of depression is common. We aimed to describe demographic and health characteristics of patients with Parkinson disease and examine sex differences in antidepressant prescriptions for those with comorbid depression using electronic medical records. METHODS: We analyzed Canadian Primary Care Sentinel Surveillance Network data for patients 18 years and older with a diagnosis of Parkinson disease who had at least 1 primary care encounter between Sep...
July 2016: CMAJ Open
Jaskaran S Kang, Maria C Bennell, Feng Qiu, Merril L Knudtson, Peter C Austin, Dennis T Ko, Harindra C Wijeysundera
BACKGROUND: Cardiovascular disease is costly, and annual expenditures are projected to increase. Our objective was to examine the variation in patient-level costs and identify drivers of cost in patients with stable coronary artery disease. METHODS: In this retrospective cohort study using administrative databases in Ontario, Canada, we identified all patients with stable coronary artery disease after index angiography between Oct. 1, 2008, and Sept. 30, 2011. We excluded patients with a myocardial infarction within 90 days before the index, with normal coronaries, or with mild coronary disease...
July 2016: CMAJ Open
Géraldine Layani, Richard Fleet, Renée Dallaire, Fatoumata K Tounkara, Julien Poitras, Patrick Archambault, Jean-Marc Chauny, Mathieu Ouimet, Josée Gauthier, Gilles Dupuis, Alain Tanguay, Jean-Frédéric Lévesque, Geneviève Simard-Racine, Jeannie Haggerty, France Légaré
BACKGROUND: Evidence-based indicators of quality of care have been developed to improve care and performance in Canadian emergency departments. The feasibility of measuring these indicators has been assessed mainly in urban and academic emergency departments. We sought to assess the feasibility of measuring quality-of-care indicators in rural emergency departments in Quebec. METHODS: We previously identified rural emergency departments in Quebec that offered medical coverage with hospital beds 24 hours a day, 7 days a week and were located in rural areas or small towns as defined by Statistics Canada...
July 2016: CMAJ Open
Fady Saleh, Aristithes G Doumouras, Scott Gmora, Mehran Anvari, Dennis Hong
BACKGROUND: Bariatric surgery centres of excellence are relatively new in Canada and were first started in Ontario in 2009. This study presents short-term outcomes of Canada's largest bariatric collaborative, from Ontario, during its first 3 years. METHODS: We performed a population-based cohort study that included all patients (age ≥ 18) who received a Roux-en-Y gastric bypass or sleeve gastrectomy for the purpose of weight loss from March 2009 to April 2012 within Ontario...
July 2016: CMAJ Open
Dat T Tran, Arto Ohinmaa, Nguyen X Thanh, Jonathan G Howlett, Justin A Ezekowitz, Finlay A McAlister, Padma Kaul
BACKGROUND: Heart failure is a costly health condition and a major public health concern. We sought to examine the costs of hospital admissions for heart failure between fiscal years 2004 and 2013 in Canada and to model the future costs to 2030. METHODS: Canadian Institutes for Health Information Discharge Abstract Database was used to identify admissions to hospital with heart failure as the primary diagnosis between fiscal years 2004 and 2013. Multiple linear regression models were used to calculate the trend in prevalence and extrapolate these to 2030...
July 2016: CMAJ Open
Vincent C Tam, Paris-Ann Ingledew, Scott Berry, Sunil Verma, Meredith E Giuliani
BACKGROUND: Studies have shown that there is a deficiency in focused oncology teaching during medical school in Canada. This study aimed to develop oncology education goals and objectives for medical students through consensus of oncology educators from across Canada. METHODS: In 2014 we created a comprehensive list of oncology education objectives using existing resources. Experts in oncology education and undergraduate medical education from all 17 Canadian medical schools were invited to participate in a 3-round modified Delphi process...
July 2016: CMAJ Open
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"