John J You

Summary

Affiliation: McMaster University
Country: Canada

Publications

  1. ncbi request reprint Indications for and results of outpatient computed tomography and magnetic resonance imaging in Ontario
    John J You
    Department of Medicine and Clinical Epidemiology, McMaster University, Hamilton, ON
    Can Assoc Radiol J 59:135-43. 2008
  2. pmc Learning from failure--rationale and design for a study about discontinuation of randomized trials (DISCO study)
    Benjamin Kasenda
    Basel Institute for Clinical Epidemiology and Biostatistics, University Hospital Basel, Basel, Switzerland
    BMC Med Res Methodol 12:131. 2012
  3. pmc Randomized controlled trial comparing telephone and mail follow-up for recruitment of participants into a clinical trial of colorectal cancer screening
    Arthur D Wong
    Department of Medicine, McMaster University, Hamilton, ON, Canada
    Trials 14:40. 2013
  4. doi request reprint Patterns of care after magnetic resonance imaging of the spine in primary care
    John J You
    Department of Medicine, McMaster University, Hamilton, Ontario, Canada
    Spine (Phila Pa 1976) 38:51-9. 2013
  5. pmc LOST to follow-up Information in Trials (LOST-IT): a protocol on the potential impact
    Elie A Akl
    Department of Medicine, State University of New York at Buffalo, Buffalo, USA
    Trials 10:40. 2009
  6. pmc Subgroup Analysis of Trials Is Rarely Easy (SATIRE): a study protocol for a systematic review to characterize the analysis, reporting, and claim of subgroup effects in randomized trials
    Xin Sun
    Department of Clinical Epidemiology and Biostatistics, McMaster University, Hamilton, Canada
    Trials 10:101. 2009
  7. pmc Stopping randomized trials early for benefit: a protocol of the Study Of Trial Policy Of Interim Truncation-2 (STOPIT-2)
    Matthias Briel
    Department of Clinical Epidemiology and Biostatistics, McMaster University, Hamilton, Canada
    Trials 10:49. 2009
  8. pmc Can computerized clinical decision support systems improve practitioners' diagnostic test ordering behavior? A decision-maker-researcher partnership systematic review
    Pavel S Roshanov
    Health Research Methodology Program, McMaster University, 1280 Main Street West, Hamilton, ON, Canada
    Implement Sci 6:88. 2011
  9. pmc Proliferation of prenatal ultrasonography
    John J You
    Department of Medicine, McMaster University, Hamilton, Ontario
    CMAJ 182:143-51. 2010
  10. doi request reprint Non-adherence to recommendations for further testing after outpatient CT and MRI
    John J You
    Department of Medicine, McMaster University, Hamilton, Ontario, Canada
    Am J Med 123:557.e1-8. 2010

Detail Information

Publications32

  1. ncbi request reprint Indications for and results of outpatient computed tomography and magnetic resonance imaging in Ontario
    John J You
    Department of Medicine and Clinical Epidemiology, McMaster University, Hamilton, ON
    Can Assoc Radiol J 59:135-43. 2008
    ..Population rates of computed tomography (CT) and magnetic resonance imaging (MRI) continue to increase markedly. However, little is known about the indications for and results of these imaging tests...
  2. pmc Learning from failure--rationale and design for a study about discontinuation of randomized trials (DISCO study)
    Benjamin Kasenda
    Basel Institute for Clinical Epidemiology and Biostatistics, University Hospital Basel, Basel, Switzerland
    BMC Med Res Methodol 12:131. 2012
    ..Currently, little is known regarding the frequency and characteristics of discontinued RCTs...
  3. pmc Randomized controlled trial comparing telephone and mail follow-up for recruitment of participants into a clinical trial of colorectal cancer screening
    Arthur D Wong
    Department of Medicine, McMaster University, Hamilton, ON, Canada
    Trials 14:40. 2013
    ..Investigators often face challenges when recruiting participants into randomized controlled trials (RCTs). Some data suggest that telephone reminders may lead to greater participant enrollment...
  4. doi request reprint Patterns of care after magnetic resonance imaging of the spine in primary care
    John J You
    Department of Medicine, McMaster University, Hamilton, Ontario, Canada
    Spine (Phila Pa 1976) 38:51-9. 2013
    ..Retrospective cohort study...
  5. pmc LOST to follow-up Information in Trials (LOST-IT): a protocol on the potential impact
    Elie A Akl
    Department of Medicine, State University of New York at Buffalo, Buffalo, USA
    Trials 10:40. 2009
    ..The secondary objectives are to describe, for published RCTs, (1) the reporting of loss to follow-up information, (2) the analytic methods used for handling loss to follow-up information, and (3) the extent of reported loss to follow-up...
  6. pmc Subgroup Analysis of Trials Is Rarely Easy (SATIRE): a study protocol for a systematic review to characterize the analysis, reporting, and claim of subgroup effects in randomized trials
    Xin Sun
    Department of Clinical Epidemiology and Biostatistics, McMaster University, Hamilton, Canada
    Trials 10:101. 2009
    ....
  7. pmc Stopping randomized trials early for benefit: a protocol of the Study Of Trial Policy Of Interim Truncation-2 (STOPIT-2)
    Matthias Briel
    Department of Clinical Epidemiology and Biostatistics, McMaster University, Hamilton, Canada
    Trials 10:49. 2009
    ..The aim of STOPIT-2 is to determine the magnitude and determinants of possible bias introduced by stopping RCTs early for benefit...
  8. pmc Can computerized clinical decision support systems improve practitioners' diagnostic test ordering behavior? A decision-maker-researcher partnership systematic review
    Pavel S Roshanov
    Health Research Methodology Program, McMaster University, 1280 Main Street West, Hamilton, ON, Canada
    Implement Sci 6:88. 2011
    ..The outcome of interest was effect on the diagnostic test-ordering behavior of practitioners...
  9. pmc Proliferation of prenatal ultrasonography
    John J You
    Department of Medicine, McMaster University, Hamilton, Ontario
    CMAJ 182:143-51. 2010
    ..The extent to which temporal increases in the use of prenatal ultrasonography reflect changes in maternal risk is unknown. In this population-based study, we examined the use of prenatal ultrasonography from 1996 to 2006 in Ontario...
  10. doi request reprint Non-adherence to recommendations for further testing after outpatient CT and MRI
    John J You
    Department of Medicine, McMaster University, Hamilton, Ontario, Canada
    Am J Med 123:557.e1-8. 2010
    ..Little is known about adherence to recommendations for further testing after outpatient computed tomography (CT) and magnetic resonance imaging (MRI)...
  11. pmc Impact of picture archiving communication systems on rates of duplicate imaging: a before-after study
    John J You
    Department of Medicine, McMaster University, 1200 Main Street West, HSC 3V51, Hamilton, Ontario, L8N 3Z5, Canada
    BMC Health Serv Res 8:234. 2008
    ..Electronic health information systems, such as picture archiving communication systems (PACS), are commonly believed to reduce the need for duplicate testing. However, empirical data to support this belief are not available...
  12. doi request reprint Patterns of care and outcomes after computed tomography scans for headache
    John J You
    Departments of Medicine and of Clinical Epidemiology and Biostatistics, McMaster University, Hamilton, Ontario, Canada
    Am J Med 124:58-63.e1. 2011
    ..concerns exist about potential overuse of computed tomography (CT) scans for headache in ambulatory care...
  13. doi request reprint Life expectancy after an index hospitalization for patients with heart failure: a population-based study
    Dennis T Ko
    Division of Cardiology, Schulich Heart Centre, Sunnybrook Health Sciences Centre, Toronto, Ontario, Canada
    Am Heart J 155:324-31. 2008
    ..However, previous studies have focused on predicting shorter-term mortality and limited data currently exist to predict expected survival among hospitalized patients with HF...
  14. doi request reprint An early invasive strategy versus ischemia-guided management after fibrinolytic therapy for ST-segment elevation myocardial infarction: a meta-analysis of contemporary randomized controlled trials
    Harindra C Wijeysundera
    Department of Medicine, Division of Cardiology, Schulich Heart Center, Sunnybrook Health Sciences Center, University of Toronto, Toronto, Ontario, Canada
    Am Heart J 156:564-572, 572.e1-2. 2008
    ....
  15. doi request reprint Improved outcomes with early collaborative care of ambulatory heart failure patients discharged from the emergency department
    Douglas S Lee
    Institute for Clinical Evaluative Sciences, University of Toronto, Toronto, ON, M4N 3M5, Canada
    Circulation 122:1806-14. 2010
    ..The type of outpatient physician care after an emergency department visit for heart failure may affect patients' outcomes. Methods and..
  16. ncbi request reprint Regional differences in process of care and outcomes for older acute myocardial infarction patients in the United States and Ontario, Canada
    Dennis T Ko
    Division of Cardiology, Schulich Heart Centre, Sunnybrook Health Sciences Centre, Toronto, Ontario, Canada
    Circulation 115:196-203. 2007
    ....
  17. ncbi request reprint Rescue angioplasty or repeat fibrinolysis after failed fibrinolytic therapy for ST-segment myocardial infarction: a meta-analysis of randomized trials
    Harindra C Wijeysundera
    Division of Cardiology, Schulich Heart Centre and Department of Medicine, Sunnybrook Health Sciences Centre, University of Toronto, Toronto, Ontario, Canada
    J Am Coll Cardiol 49:422-30. 2007
    ....
  18. ncbi request reprint Relation between cardiac troponin I and mortality in acute decompensated heart failure
    John J You
    Institute for Clinical Evaluative Sciences, University of Toronto, Ontario, Canada
    Am Heart J 153:462-70. 2007
    ..Troponin level elevations are common in patients with acute decompensated heart failure (ADHF), yet their prognostic value above and beyond traditional predictors of outcomes in heart failure is uncertain...
  19. pmc Antithrombotic therapy for atrial fibrillation: Antithrombotic Therapy and Prevention of Thrombosis, 9th ed: American College of Chest Physicians Evidence-Based Clinical Practice Guidelines
    John J You
    Department of Medicine, McMaster University, Hamilton, ON, Canada
    Chest 141:e531S-75S. 2012
    ..We provide recommendations for antithrombotic treatment based on net clinical benefit for patients with AF at varying levels of stroke risk and in a number of common clinical scenarios...
  20. pmc Major radiodiagnostic imaging in pregnancy and the risk of childhood malignancy: a population-based cohort study in Ontario
    Joel G Ray
    Department of Medicine, St Michael s Hospital, Toronto, Ontario, Canada
    PLoS Med 7:e1000337. 2010
    ..The association between fetal exposure to major radiodiagnostic testing in pregnancy-computed tomography (CT) and radionuclide imaging-and the risk of childhood cancer is not established...
  21. ncbi request reprint Spine surgeons' requirements for imaging at the time of referral: a survey of Canadian spine surgeons
    Jason W Busse
    The Department of Anesthesia, McMaster University, Hamilton, Ont, Department of Clinical Epidemiology and Biostatistics, McMaster University, Hamilton, Ont
    Can J Surg 57:E25-30. 2014
    ..Our objective was to explore Canadian spine surgeons' requirements with respect to imaging studies accompanying spine-related referrals...
  22. ncbi request reprint Active surveillance, radiofrequency ablation, or cryoablation for the nonsurgical management of a small renal mass: a cost-utility analysis
    Sasha N Bhan
    Department of Radiology, McMaster University, Hamilton, ON, Canada
    Ann Surg Oncol 20:3675-84. 2013
    ..Patients with a cortical small (≤4 cm) renal mass often are not candidates for or choose not to undergo surgery. The optimal management strategy for such patients is unclear...
  23. doi request reprint Failure to engage hospitalized elderly patients and their families in advance care planning
    Daren K Heyland
    Clinical Evaluation Research Unit, Department of Medicine, Kingston General Hospital, Angada 4, Kingston, ON K7L 2V7, Canada
    JAMA Intern Med 173:778-87. 2013
    ..Advance care planning can improve patient-centered care and potentially reduce intensification of care at the end of life...
  24. ncbi request reprint Head CT for nontrauma patients in the emergency department: clinical predictors of abnormal findings
    Xi Wang
    Department of Radiology, McMaster University, 1280 Main St West, Room HSC 2C8, Hamilton, ON, Canada L8S 4K1
    Radiology 266:783-90. 2013
    ..To identify predictors of clinically important abnormal findings in computed tomography (CT) images of the head among emergency department (ED) patients without a history of trauma...
  25. pmc Identification of myocardial injury in the emergency setting
    Peter A Kavsak
    Department of Pathology and Molecular Medicine, McMaster University, Hamilton, ON, Canada
    Clin Biochem 43:539-44. 2010
    ....
  26. ncbi request reprint Life expectancy gains and cost-effectiveness of implantable cardioverter/defibrillators for the primary prevention of sudden cardiac death in patients with hypertrophic cardiomyopathy
    John J You
    Institute for Clinical Evaluative Sciences, Toronto, Ontario, Canada
    Am Heart J 154:899-907. 2007
    ..Sudden cardiac death (SCD) is a devastating complication of hypertrophic cardiomyopathy (HCM). The optimal strategy for the primary prevention of SCD in HCM remains controversial...
  27. pmc Quality of discharge summaries prepared by first year internal medicine residents
    Kimberly Legault
    Department of Medicine, McMaster University, 25 Charlton Ave East, Suite 708, Hamilton, ON L8P 3B2, Canada
    BMC Med Educ 12:77. 2012
    ..We evaluated discharge summaries produced by incoming postgraduate year 1 (PGY-1) internal medicine residents for their completeness, accuracy, and relevance to family physicians...
  28. doi request reprint How to use a noninferiority trial: users' guides to the medical literature
    Sohail M Mulla
    Department of Clinical Epidemiology and Biostatistics, Faculty of Health Sciences, McMaster University, Hamilton, Ontario, Canada
    JAMA 308:2605-11. 2012
    ....
  29. pmc Attitudes of Family Physicians, Specialists and Radiologists about the Use of Computed Tomography and Magnetic Resonance Imaging in Ontario
    John J You
    Assistant Professor of Medicine, McMaster University, Hamilton, ON
    Healthc Policy 5:54-65. 2009
    ..Despite efforts to reduce wait times for computed tomography (CT) and magnetic resonance imaging (MRI) in Ontario, little is known about physicians' attitudes regarding contemporary patterns of CT and MRI scan use in this province...
  30. doi request reprint Extracardiac findings in cardiac computed tomographic angiography in patients at low to intermediate risk for coronary artery disease
    Vikram Venkatesh
    Department of Radiology, McMaster University, Hamilton, Ontario, Canada
    Can Assoc Radiol J 61:286-90. 2010
    ..To evaluate the prevalence, clinical significance, interobserver agreement, and follow-up of extracardiac findings on coronary computed tomographic angiography (CTA)...
  31. ncbi request reprint Appropriateness of spironolactone prescribing in heart failure patients: a population-based study
    Dennis T Ko
    Division of Cardiology, Shulich Heart Centre, Department of Medicine, Sunnybrook and Women s Health Sciences Centre, Toronto, Ontario, Canada
    J Card Fail 12:205-10. 2006
    ..However, recent data have raised concerns regarding hyperkalemia secondary to spironolactone use and suggest it occurs more commonly in routine practice...