Published in CMAJ on March 25, 2008
Written informed consent and selection bias in observational studies using medical records: systematic review. BMJ (2009) 2.27
How strong are passwords used to protect personal health information in clinical trials? J Med Internet Res (2011) 1.87
Privacy by Design at Population Data BC: a case study describing the technical, administrative, and physical controls for privacy-sensitive secondary use of personal information for research in the public interest. J Am Med Inform Assoc (2012) 1.03
Opt-out as an acceptable method of obtaining consent in medical research: a short report. BMC Med Res Methodol (2011) 1.00
Concurrent physician-diagnosed asthma and chronic obstructive pulmonary disease: A population study of prevalence, incidence and mortality. PLoS One (2017) 0.75
Joint replacement recipients' views about health information privacy. Health Expect (2013) 0.75
Impracticability of informed consent in the Registry of the Canadian Stroke Network. N Engl J Med (2004) 9.85
Data protection, informed consent, and research. BMJ (2004) 4.25
Consent, confidentiality, and the threat to public health surveillance. BMJ (2002) 3.96
Selection bias from requiring patients to give consent to examine data for health services research. Arch Fam Med (2001) 3.08
A feasibility study of signed consent for the collection of patient identifiable information for a national paediatric clinical audit database. BMJ (2005) 2.96
The impact of requiring patient authorization for use of data in medical records research. J Fam Pract (1998) 2.64
The requirement for prior consent to participate on survey response rates: a population-based survey in Grampian. BMC Health Serv Res (2003) 1.71
Medical records and privacy: empirical effects of legislation. Health Serv Res (1999) 1.46
Registries and informed consent. N Engl J Med (2004) 1.18
Outcome of heart failure with preserved ejection fraction in a population-based study. N Engl J Med (2006) 10.58
Relation between age and cardiovascular disease in men and women with diabetes compared with non-diabetic people: a population-based retrospective cohort study. Lancet (2006) 6.64
Predicting mortality among patients hospitalized for heart failure: derivation and validation of a clinical model. JAMA (2003) 6.39
Adherence with statin therapy in elderly patients with and without acute coronary syndromes. JAMA (2002) 6.30
A population-based study of the drug interaction between proton pump inhibitors and clopidogrel. CMAJ (2009) 6.21
A multicenter study of the coding accuracy of hospital discharge administrative data for patients admitted to cardiac care units in Ontario. Am Heart J (2002) 4.65
Comparison of coding of heart failure and comorbidities in administrative and clinical data for use in outcomes research. Med Care (2005) 4.30
Warfarin use and the risk for stroke and bleeding in patients with atrial fibrillation undergoing dialysis. Circulation (2014) 3.78
Relation of disease pathogenesis and risk factors to heart failure with preserved or reduced ejection fraction: insights from the framingham heart study of the national heart, lung, and blood institute. Circulation (2009) 3.55
Assessing the association of appropriateness of coronary revascularization and clinical outcomes for patients with stable coronary artery disease. J Am Coll Cardiol (2012) 3.45
Effect of socioeconomic status on treatment and mortality after stroke. Stroke (2002) 3.44
Potentially preventable strokes in high-risk patients with atrial fibrillation who are not adequately anticoagulated. Stroke (2008) 3.14
Prognosis and determinants of survival in patients newly hospitalized for heart failure: a population-based study. Arch Intern Med (2002) 3.09
Risk-treatment mismatch in the pharmacotherapy of heart failure. JAMA (2005) 3.05
Socioeconomic status and mortality after acute myocardial infarction. Ann Intern Med (2006) 3.02
Rhythm versus rate control therapy and subsequent stroke or transient ischemic attack in patients with atrial fibrillation. Circulation (2012) 2.96
Comparing hierarchical modeling with traditional logistic regression analysis among patients hospitalized with acute myocardial infarction: should we be analyzing cardiovascular outcomes data differently? Am Heart J (2003) 2.88
Deriving ethnic-specific BMI cutoff points for assessing diabetes risk. Diabetes Care (2011) 2.87
Impact of hospital nursing care on 30-day mortality for acute medical patients. J Adv Nurs (2007) 2.85
Use of fibrates in the United States and Canada. JAMA (2011) 2.82
Prevalence, predictors, and outcomes of primary nonadherence after acute myocardial infarction. Circulation (2008) 2.76
Automated variable selection methods for logistic regression produced unstable models for predicting acute myocardial infarction mortality. J Clin Epidemiol (2004) 2.69
Association of temporal trends in risk factors and treatment uptake with coronary heart disease mortality, 1994-2005. JAMA (2010) 2.61
Care and outcomes of patients newly hospitalized for heart failure in the community treated by cardiologists compared with other specialists. Circulation (2003) 2.61
Administrative Data Feedback for Effective Cardiac Treatment: AFFECT, a cluster randomized trial. JAMA (2005) 2.54
Safety and efficacy of drug-eluting and bare metal stents: comprehensive meta-analysis of randomized trials and observational studies. Circulation (2009) 2.40
The use of the propensity score for estimating treatment effects: administrative versus clinical data. Stat Med (2005) 2.31
Effects of contemporary troponin assay sensitivity on the utility of the early markers myoglobin and CKMB isoforms in evaluating patients with possible acute myocardial infarction. Clin Chim Acta (2007) 2.31
Improved outcomes with early collaborative care of ambulatory heart failure patients discharged from the emergency department. Circulation (2010) 2.29
IScore: a risk score to predict death early after hospitalization for an acute ischemic stroke. Circulation (2011) 2.29
Sex differences in carotid endarterectomy outcomes: results from the Ontario Carotid Endarterectomy Registry. Stroke (2003) 2.28
Comparison of provincial prescription drug plans and the impact on patients' annual drug expenditures. CMAJ (2008) 2.23
The potential economic impact of restricted access to angiotensin-receptor blockers. CMAJ (2011) 2.22
Trends in risk factors for cardiovascular disease in Canada: temporal, socio-demographic and geographic factors. CMAJ (2009) 2.16
Effect of cardiac and noncardiac conditions on survival after defibrillator implantation. J Am Coll Cardiol (2007) 2.15
Bundle branch block patterns and long-term outcomes in heart failure. Int J Cardiol (2010) 2.07
Aspirin use and outcomes in a community-based cohort of 7352 patients discharged after first hospitalization for heart failure. Circulation (2006) 2.05
Cardiovascular complications and mortality after diabetes diagnosis for South Asian and Chinese patients: a population-based cohort study. Diabetes Care (2013) 2.04
Prevalence and extent of obstructive coronary artery disease among patients undergoing elective coronary catheterization in New York State and Ontario. JAMA (2013) 2.03
Use of niacin in the United States and Canada. JAMA Intern Med (2013) 2.02
Long-term trends in use of and expenditures for cardiovascular medications in Canada. CMAJ (2009) 2.02
The striking effect of the Heart Outcomes Prevention Evaluation (HOPE) on ramipril prescribing in Ontario. CMAJ (2003) 1.94
Life expectancy after an index hospitalization for patients with heart failure: a population-based study. Am Heart J (2008) 1.92
Lifetime analysis of hospitalizations and survival of patients newly admitted with heart failure. Circ Heart Fail (2012) 1.92
Comparison of cardiovascular risk profiles among ethnic groups using population health surveys between 1996 and 2007. CMAJ (2010) 1.85
Use of ezetimibe in the United States and Canada. N Engl J Med (2008) 1.85
Early deaths in patients with heart failure discharged from the emergency department: a population-based analysis. Circ Heart Fail (2010) 1.83
Temporal trends in the use of percutaneous coronary intervention and coronary artery bypass surgery in New York State and Ontario. Circulation (2010) 1.82
Sex differences in implantable cardioverter-defibrillator outcomes: findings from a prospective defibrillator database. Ann Intern Med (2012) 1.80
Regional differences in process of care and outcomes for older acute myocardial infarction patients in the United States and Ontario, Canada. Circulation (2006) 1.78
Diuretic dose and long-term outcomes in elderly patients with heart failure after hospitalization. Am Heart J (2010) 1.76
Geography and service supply do not explain socioeconomic gradients in angiography use after acute myocardial infarction. CMAJ (2003) 1.76
Impact of the choice of benchmark on the conclusions of hospital report cards. Am Heart J (2004) 1.72
Hospitalization rates and length of stay for cardiovascular conditions in Canada, 1994 to 1999. Can J Cardiol (2003) 1.71
Emergency department triage of acute myocardial infarction patients and the effect on outcomes. Ann Emerg Med (2009) 1.71
Inpatient smoking-cessation counseling and all-cause mortality in patients with acute myocardial infarction. Am Heart J (2007) 1.69
The identification and development of Canadian coronary artery bypass graft surgery quality indicators. J Thorac Cardiovasc Surg (2005) 1.68
The effect of a charted history of depression on emergency department triage and outcomes in patients with acute myocardial infarction. CMAJ (2011) 1.66
Meta-analysis of the effects of endothelin receptor blockade on survival in experimental heart failure. J Card Fail (2003) 1.64
Population rates of cardiac catheterization and yield of high-risk coronary artery disease. CMAJ (2005) 1.64
How many arterial grafts are enough? A population-based study of midterm outcomes. J Thorac Cardiovasc Surg (2006) 1.62
Time-related mortality for women after coronary artery bypass graft surgery: a population-based study. J Thorac Cardiovasc Surg (2004) 1.62
Factors explaining the under-use of reperfusion therapy among ideal patients with ST-segment elevation myocardial infarction. Eur Heart J (2006) 1.62
Meta-analysis: effects of percutaneous coronary intervention versus medical therapy on angina relief. Ann Intern Med (2010) 1.62
Waiting times, revascularization modality, and outcomes after acute myocardial infarction at hospitals with and without on-site revascularization facilities in Canada. J Am Coll Cardiol (2003) 1.58
Relation between cardiac troponin I and mortality in acute decompensated heart failure. Am Heart J (2007) 1.58
Predictors of short-term complications after implantable cardioverter-defibrillator replacement: results from the Ontario ICD Database. Circ Arrhythm Electrophysiol (2011) 1.58
Recent trends in cardiovascular complications among men and women with and without diabetes. Diabetes Care (2006) 1.57
Rescue angioplasty or repeat fibrinolysis after failed fibrinolytic therapy for ST-segment myocardial infarction: a meta-analysis of randomized trials. J Am Coll Cardiol (2007) 1.56
Neighborhood income and stroke care and outcomes. Neurology (2012) 1.56
Trends in cardiovascular drug utilization and drug expenditures in Canada between 1996 and 2001. Can J Cardiol (2003) 1.56
Relationship between preventability of death after coronary artery bypass graft surgery and all-cause risk-adjusted mortality rates. Circulation (2008) 1.56
Trends in heart failure outcomes and pharmacotherapy: 1992 to 2000. Am J Med (2004) 1.55
Discriminating clinical features of heart failure with preserved vs. reduced ejection fraction in the community. Eur Heart J (2012) 1.53
Class effects of statins in elderly patients with congestive heart failure: a population-based analysis. Am Heart J (2007) 1.53
Effect of different angiotensin-converting-enzyme inhibitors on mortality among elderly patients with congestive heart failure. CMAJ (2008) 1.51
Surname lists to identify South Asian and Chinese ethnicity from secondary data in Ontario, Canada: a validation study. BMC Med Res Methodol (2010) 1.50
Public versus private institutional performance reporting: what is mandatory for quality improvement? Am Heart J (2006) 1.50
Using methods from the data-mining and machine-learning literature for disease classification and prediction: a case study examining classification of heart failure subtypes. J Clin Epidemiol (2013) 1.50
Standardized approaches to the investigation of syncope: Canadian Cardiovascular Society position paper. Can J Cardiol (2011) 1.47
Quality of care of international and Canadian medical graduates in acute myocardial infarction. Arch Intern Med (2005) 1.47
Gender differences in outcomes after hospital discharge from coronary artery bypass grafting. Circulation (2006) 1.46
How many patients with heart failure are eligible for cardiac resynchronization? Insights from two prospective cohorts. Eur Heart J (2005) 1.45
Identifying priorities in methodological research using ICD-9-CM and ICD-10 administrative data: report from an international consortium. BMC Health Serv Res (2006) 1.45
Regional variation in self-reported heart disease prevalence in Canada. Can J Cardiol (2005) 1.44
Effectiveness of statins for secondary prevention in elderly patients after acute myocardial infarction: an evaluation of class effect. CMAJ (2005) 1.43
Evaluation of early complications related to De Novo cardioverter defibrillator implantation insights from the Ontario ICD database. J Am Coll Cardiol (2010) 1.41
Stroke care delivery in institutions participating in the Registry of the Canadian Stroke Network. Stroke (2004) 1.41
Comparing invasive and noninvasive management strategies for acute myocardial infarction using administrative databases. Am Heart J (2008) 1.40
The pre-hospital fibrinolysis experience in Europe and North America and implications for wider dissemination. JACC Cardiovasc Interv (2011) 1.38
Impact of renal insufficiency on short- and long-term outcomes after cardiac surgery. Am Heart J (2004) 1.38
The use of fixed- and random-effects models for classifying hospitals as mortality outliers: a Monte Carlo assessment. Med Decis Making (2003) 1.37
Measuring and reducing waiting times: a cross-national comparison of strategies. Health Aff (Millwood) (2007) 1.37
Mitral repair versus replacement for ischemic mitral regurgitation. Ann Thorac Surg (2005) 1.36
Missed opportunities in the secondary prevention of myocardial infarction: an assessment of the effects of statin underprescribing on mortality. Am Heart J (2006) 1.36
CCORT/CCS quality indicators for acute myocardial infarction care. Can J Cardiol (2003) 1.35
A comparison of several regression models for analysing cost of CABG surgery. Stat Med (2003) 1.31
Factoring socioeconomic status into cardiac performance profiling for hospitals: does it matter? Med Care (2002) 1.30
Regression trees for predicting mortality in patients with cardiovascular disease: what improvement is achieved by using ensemble-based methods? Biom J (2012) 1.28