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Publication Results (66)

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  • Analysis of the relationship between surgeon procedure volume and complications after total knee arthroplasty using a propensity-matched cohort study

    Okoro T, Tomescu S, Paterson JM, Ravi B. BMJ Surg Interv Health Technologies. 2021; 3:e000072. Epub 2021 Apr 2. DOI:

  • Patterns of pre-operative opioid use affect the risk for complications after total joint replacement

    Ravi B, Pincus D, Croxford R, Leroux T, Paterson JM, Hawker G, Redelmeier DA. Sci Rep. 2021; 11(1):22124. Epub 2021 Nov 11. DOI:

  • The impact of common urologic complications on the risk of a periprosthetic joint infection

    Punjani N, Lanting B, McClure JA, Winick-Ng J, Welk B. J Bone Joint Surg Am. 2018; 100(17):1517-23. Epub 2018 Sep 5.

  • Association between surgical approach and major surgical complications in patients undergoing total hip arthroplasty

    Pincus D, Jenkinson R, Paterson M, Leroux T, Ravi B. JAMA. 2020; 323(11):1070-76. Epub 2020 Mar 17. DOI:

  • A population-based nested case-control study of the costs of hip and knee replacement surgery

    Hawker GA, Badley EM, Croxford R, Coyte PC, Glazier RH, Guan J, Harvey BJ, Williams JI, Wright JG. Med Care. 2009; 47(7):732-41.

  • Statins and the risk of herpes zoster: a population-based cohort study

    Antoniou T, Zheng H, Singh S, Juurlink DN, Mamdani MM, Gomes T. Clin Infect Dis. 2014; 58(3):350-6. Epub 2013 Nov 13.

  • Increased surgeon experience with rheumatoid arthritis reduces the risk of complications following total joint arthroplasty

    Ravi B, Croxford R, Austin PC, Hollands S, Paterson JM, Bogoch E, Kreder H, Hawker GA. Arthritis Rheumatol. 2014; 66(3):488-9. Epub 2013 Oct 21.

  • Preoperative anesthesiology consult utilization in Ontario - a population-based study

    Dion JMM, Campbell RJ, Nguyen P, Beyea JA. J Eval Clin Pract. 2022; 28(1):151-8. Epub 2021 Jun 30. DOI:

  • December 2016

    • Rise in single father-led households, while single fathers less likely than single mothers to access mental health care despite similar need
    • $2.1 billion to treat Ontarians with psychotic disorders in single year, with costs growing with age
    • ICES research video series: Jack Tu on big data study on 20-year trends in atherosclerotic cardiovascular disease
    • Canadians with traumatic brain injury more likely to be federally incarcerated
    • Opioid prescribing declines following release of national guidelines for physicians, but rates of overdose-related hospital visits continue to climb
    • Health care for children with diabetes mellitus from low-income families in Ontario and California: a population-based cohort study
    • Risk of fractures after stroke: results from the Ontario Stroke Registry
    • Primary care physician volume and quality of diabetes care: a population-based cohort study
    • Peripheral nerve blockade for primary total knee arthroplasty: a population-based cohort study of outcomes and resource utilization
  • Association of frailty and 1-year postoperative mortality following major elective noncardiac surgery: a population-based cohort study

    McIsaac DI, Bryson GL, van Walraven C. JAMA Surg. 2016; 151(6):538-45. Epub 2016 Jan 20.

  • The epidemiology of revision anterior cruciate ligament reconstruction in Ontario, Canada

    Leroux T, Wasserstein D, Dwyer T, Ogilvie-Harris DJ, Marks PH, Bach BR, Townley JB, Mahomed N, Chahal J. Am J Sports Med. 2014; 42(11):2666-72. Epub 2014 Sep 11.

  • Association between socioeconomic deprivation and surgical complications in adults undergoing ankle fracture fixation: a population-based analysis

    Wolfstadt JI, Pincus D, Kreder HJ, Wasserstein D. Can J Surg. 2019; 62(5):320-7. Epub 2019 Oct 1. DOI: 10.1503/cjs.012018.

  • Chronic opioid use after joint replacement surgery in seniors is associated with increased healthcare utilization and costs: a historical cohort study

    Johnson A, Milne B, Jamali N, Pasquali M, Gilron I, Mann S, Moore K, Graves E, Parlow J. Can J Anaesth. 2022; 69(8):963-73. Epub 2022 Mar 22. DOI:

  • Primary hip and knee replacement surgery: Ontario criteria for case selection and surgical priority

    Naylor CD, Williams JI. Qual Health Care. 1996; 5(1):20-30.

  • Statins and intracerebral hemorrhage: a retrospective cohort study

    Hackam DG, Austin PC, Huang A, Juurlink DN, Mamdani MM, Paterson JM, Hachinski V, Li P, Kapral MK. Arch Neurol . 2011; 69(1):39-45. Epub 2011 Sep 12.

  • January 2020

    Impact Stories
    • Surgical duration is associated with an increased risk of periprosthetic infection following total knee arthroplasty: a population-based retrospective cohort study
    • The risk of death within five years of first hospitalization in older adults
    • Determinants of direct discharge home from critical care units: a population-based cohort analysis
    • High-cost patients and preventable spending: a population-based study
    • Prescribing of oral anticoagulants in the emergency department and subsequent long-term use by older adults with atrial fibrillation
      ICES in the News
      • Neighbourhood-level marginalization and avoidable mortality in Ontario, Canada: a population-based study
      • Association of patient, prescriber, and region with the initiation of first prescription of biologic disease-modifying antirheumatic drug among older patients with rheumatoid arthritis and identical health insurance coverage
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      • Characterising risk of homicide in a population-based cohort
      • Association between hospital teaching status and outcomes after out-of-hospital cardiac arrest
      • The direct healthcare costs attributable to West Nile virus illness in Ontario, Canada: a population-based cohort study using laboratory and health administrative data
      • Resident trainees increase surgical time: a comparison of obstetric and gynaecologic procedures in academic versus community hospitals
      • Comparative effectiveness of fluoroquinolone antibiotic use in uncomplicated acute exacerbations of COPD: a multi-cohort study
      • Changes in opioid prescribing behaviors among family physicians who participated in a weekly tele-mentoring program
      • A new record linkage for assessing infant mortality rates in Ontario, Canada
    • February 2020

      • Mortality in a cohort of 3.1 million children, adolescents and young adults
      • Factors associated with emergency department presentation after total joint arthroplasty: a population-based retrospective cohort study
      • Sex differences in care need and survival in patients admitted to nursing home poststroke
      • Evaluation of opioid discontinuation after non-orthopaedic surgery among chronic opioid users: a population-based cohort study
        ICES in the News
        • First-ever ischemic stroke and incident major adverse cardiovascular events in 93 627 older women and men
        • Closed for business? Using a mixture model to explore the supply of psychiatric care for new patients
        • Utilization of advanced cardiovascular therapies in the United States and Canada: an observational study of New York and Ontario administrative data
        • Hydromorphone and the risk of infective endocarditis among people who inject drugs: a population-based, retrospective cohort study
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        • The impact of repeated vaccination using 10-year vaccination history on protection against influenza in older adults: a test-negative design study across the 2010/11 to 2015/16 influenza seasons in Ontario, Canada
        • Impact of a publicly funded herpes zoster immunization program on the burden of disease in Ontario, Canada: a population-based study
        • Socioeconomic status and days alive and out of hospital after major elective noncardiac surgery: a population-based cohort study
        • Infant and maternal outcomes for women who experience imprisonment in Ontario Canada: a retrospective cohort study
        • Health care utilization for musculoskeletal issues during the pre-diagnosis period in psoriatic arthritis: a population-based study
        • Incidence and outcomes of invasive fungal infection among solid organ transplant recipients: a population-based cohort study
        • Impact of diabetes on colorectal cancer stage and mortality risk: a population-based cohort study
      • September 2021

        • Understanding COVID-19 risk in patients with immune mediated inflammatory diseases: a population-based analysis of SARS-CoV-2 testing
        • Outcomes and healthcare resource utilization in adult congenital heart disease patients with heart failure
        • Opioid use after outpatient elective general surgery: quantifying the burden of persistent use
        ICES in the News
        • Risk of cancer-specific death for patients diagnosed with neuroendocrine tumors: a population-based analysis
        • COVID-19 positivity rates, hospitalizations and mortality of adults with and without intellectual and developmental disabilities in Ontario, Canada
        • COVID-19 testing and percent positivity in Ontario
        • Comparison of 4-year health care expenditures associated with roux-en-y gastric bypass vs sleeve gastrectomy
        • Prediction of risk of prolonged post-concussion symptoms: Derivation and validation of the TRICORDRR (Toronto Rehabilitation Institute Concussion Outcome Determination and Rehab Recommendations) score
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        • Incidence of chronic immune-mediated inflammatory diseases after diagnosis with Kawasaki disease: a population-based cohort study
        • Association of surgical experience with risk of complication in total hip arthroplasty among patients with severe obesity
        • Incidence, predictors and patterns of care of patients with very severe hypertriglyceridemia in Ontario, Canada: a population-based cohort study
        • Renin-angiotensin-aldosterone system inhibitors and major cardiovascular events and acute kidney injury in patients with coronary artery disease
        • International comparison of spending and utilization at the end of life for hip fracture patients
        • Risk of acute kidney injury after hypertensive disorders of pregnancy: a population-based cohort study
        • Health services utilization prior to amyotrophic lateral sclerosis diagnosis: a province-wide study of individuals treated with riluzole in Ontario, Canada
        • The impact of language on emergency department visits, hospitalizations, and length of stay among home care recipients
      • January 2022

        • Physician health care visits for mental health and substance use during the COVID-19 pandemic in Ontario, Canada
        • Trends in health service use for Canadian adults with dementia and Parkinson disease during the first wave of the COVID-19 pandemic
        • Patterns of medication and healthcare use among people who died of an opioid-related toxicity during the COVID-19 pandemic in Ontario
        • Unintentional pediatric cannabis exposures after legalization of recreational cannabis in Canada
        • Rates in bronchiolitis hospitalization, intensive care unit use, mortality, and costs from 2004 to 2018
        ICES in the News
        • COVID-19 testing and vaccination coverage in Ontario
        • Comparison of self-harm or overdose among adolescents and young adults before vs during the COVID-19 pandemic in Ontario
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        • A population-based analysis of diabetes-related care measures, foot complications, and amputation during the COVID-19 pandemic in Ontario, Canada
        • Impact of care by gynecologic oncologists on primary ovarian cancer survival: a population-based study
        • Factors associated with SARS-CoV-2 test positivity in long-term care homes: a population-based cohort analysis using machine learning
        • Comparative fracture risk during osteoporosis drug holidays after long-term risedronate versus alendronate therapy: a propensity score-matched cohort study
        • Incidence and outcomes associated with Clostridioides difficile infection in solid organ transplant recipients
        • Real world evidence of the association between medication and life expectancy in elderly inflammatory bowel disease: a population-based cohort study
        • Shape of the association between preoperative hemoglobin level and postoperative outcomes in patients undergoing primary arthroplasty
        • COVID-19 vaccination uptake among individuals with immune-mediated inflammatory diseases in Ontario, Canada between December 2020 and October 2021: a population-based analysis
      • The rate of unnecessary interventions for the management of knee osteoarthritis: a population-based cohort study

        Marsh JD, Degen R, Birmingham TB, Giffin JR, Getgood A, Litchfield R, Willits K, McClure JA, Welk B. Can J Surg. 2022; 65(1):E114-20. Epub 2022 Feb 17. DOI:

      • Comparison of early and delayed fixation of subcapital hip fractures in patients sixty years of age or less

        Jain R, Koo M, Kreder H, Schemitsch E, Davey J, Mahomed N. J Bone Joint Surg Am. 2002; 84(9):1605-12.
      • Provider volumes and early outcomes of primary total joint replacement in Ontario

        Paterson JM, Williams JI, Kreder HJ, Mahomed NN, Gunraj N, Wang X, Laupacis A. Can J Surg. 2010; 53(3):175-83.

      • The frequency and risk factors for subsequent surgery after a simple elbow dislocation

        Modi CS, Wasserstein D, Mayne IP, Henry PD, Mahomed N, Veillette CJ. Injury. 2015; 46(6):1156-60. Epub 2015 Mar 5.

      • Use of instrumented lumbar spinal surgery for degenerative conditions: trends and costs over time in Ontario, Canada

        Xu Y, Yen D, Whitehead M, Xu J, Johnson AP. Can J Surg. 2019; 62(6):017016. Epub 2019 Sep 23. DOI:

      • Association of overlapping surgery with increased risk for complications following hip surgery: a population-based, matched cohort study

        Ravi B, Pincus D, Wasserstein D, Govindarajan A, Huang A, Austin PC, Jenkinson R, Henry PDG, Paterson JM, Kreder HJ. JAMA Intern Med. 2018; 178(1):75-83. Epub 2017 Dec 4.

      • Hip arthroscopy utilization and reoperation rates in Ontario: a population-based analysis comparing different age cohorts

        Degen RM, McClure JA, Le B, Welk B, Lanting B, Marsh JD. Can J Surg. 2022; 65(2):E228-35. Epub 2022 Apr 1. DOI: