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Publication Results (726)

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  • Patterns of initial management of node-negative breast cancer in two Canadian provinces

    Goel V, Olivotto I, Hislop TG, Sawka C, Coldman A, Holowaty EJ. CMAJ. 1997; 156(1):25-35.

  • The influence of risk on the results of warm heart surgery: a substudy of a randomized trial

    Christakis GT, Lichtenstein SV, Buth KJ, Fremes SE, Weisel RD, Naylor CD. Eur J Cardiothorac Surg. 1997;11(3):515-20.

  • In the queue for total joint replacement: patients' perspectives on waiting times

    Llewellyn-Thomas HA, Arshinoff R, Bell M, Williams JI, Naylor CD. J Eval Clin Pract. 1998; 4(1):63-74.

  • Gender differences in carotid imaging and revascularization following stroke

    Kapral MK, Ben-Yakov M, Fang J, Gladstone DJ, Saposnik G, Robertson A, Silver FL. Neurology. 2009; 73(23):1969-74.

  • Outcomes and processes of care related to preoperative medical consultation

    Wijeysundera DN, Austin PC, Beattie WS, Hux JE, Laupacis A. Arch Intern Med. 2010; 170(15):1365-74.

  • Relationship of erythrocyte transfusion with short- and long-term mortality in a population-based surgical cohort

    Karkouti K, Stukel TA, Beattie WS, Elsaadany S, Li P, Berger R, Wijeysundera DN. Anesthesiology. 2012; 117(6):1175-83.

  • Higher surgeon and hospital volume improves long-term survival after radical cystectomy

    Kulkarni GS, Urbach DR, Austin PC, Fleshner NE, Laupacis A. Cancer. 2013; 119(19):3546-54. Epub 2013 Jul 9.

  • Using G-computation to estimate the effect of regionalization of surgical services on the absolute reduction in the occurrence of adverse patient outcomes

    Austin PC, Urbach DR. Med Care. 2013; 51(9):797-805.

  • Fifteen-year trends in risk severity and operative mortality in elderly patients undergoing coronary artery bypass graft surgery

    Ivanov J, Weisel RD, David TE, Naylor CD. Circulation. 1998; 97(7):673-80.

  • Will elderly patients stand aside for younger patients in the queue for cardiac services?

    Mariotto A, De Leo D, Buono MD, Favaretti C, Austin P, Naylor CD. Lancet. 1999; 354(9177):467-70.

  • Outcome of revascularization procedures for peripheral arterial occlusive disease in Ontario between 1991 and 1998: a population-based study

    Al-Omran M, Tu JV, Johnston KW, Mamdani MM, Kucey DS. J Vasc Surg. 2003; 38(2):279-88.

  • Effect of widespread restrictions on the use of hospital services during an outbreak of severe acute respiratory syndrome

    Schull MJ, Stukel TA, Vermeulen MJ, Zwarenstein M, Alter DA, Manuel DG, Guttmann A, Laupacis A, Schwartz B. CMAJ. 2007; 176(13):1827-32.

  • Factors associated with incomplete colonoscopy: a population-based study

    Shah H, Paszat LF, Saskin R, Stukel TA, Rabeneck L. Gastroenterology. 2007; 132(7):2297-303. Epub 2007 Mar 21.

  • Cholecystostomy: a bridge to hospital discharge but not delayed cholecystectomy

    de Mestral C, Gomez D, Haas B, Zagorski B, Rotstein OD, Nathens AB. J Trauma Acute Care Surg. 2013; 74(1):175-80.

  • Misclassification of hospital volume in surgical volume-outcome analyses of persons aged 65 years and older: potential limitations of medicare data

    Baxter NN, Urbach D. Evid Based Surg. 2003; 1(1):49-55.

  • Association between perioperative beta blocker use and cancer survival following surgical resection

    Musselman RP, Bennett S, Li W, Mamdani M, Gomes T, van Walraven C, Boushey R, Al-Obeed O, Al-Omran M, Auer RC. Eur J Surg Oncol. 2018; 44(8):1164-9. Epub 2018 May 17.

  • Utilization of pre-operative imaging for colon cancer: a population-based study

    McInnes MD, Nanji S, Mackillop WJ, Flemming JA, Wei X, Macdonald DB, Scheida N, Booth CM. J Surg Oncol. 2017; 115(2):202-7. Epub 2016 Nov 4.

  • Effects of impairment in activities of daily living on predicting mortality following hip fracture surgery in studies using administrative healthcare databases

    Seitz DP, Anderson GM, Austin PC, Gruneir A, Gill SS, Bell CM, Rochon PA. BMC Geriatr. 2014; 14:9. Epub 2014 Jan 28.

  • Initiation of antidepressant medication after hip fracture in community-dwelling older adults

    Iaboni A, Seitz DP, Fischer HD, Diong CC, Rochon PA, Flint AJ. Am J Geriatr Psychiatry. 2015; 23(10):1007-15. Epub 2014 Oct 16.

  • Contralateral prophylactic mastectomy in young women with breast cancer: a population-based analysis of predictive factors and clinical impact

    Bouchard-Fortier A, Baxter NN, Sutradhar R, Fernandes K, Camacho X, Graham P, Quan ML. Curr Oncol. 2018; 25(6):e562-8. Epub 2018 Dec 1.

  • Do lower risk thyroid cancer patients who live in regions with more aggressive treatments have better outcomes?

    Hall S, Irish JC, Groome PA, Griffiths R, Hurlbut D. Thyroid. 2017; 27(10):1246-57. Epub 2017 Aug 29.

  • A population-based comparison of joint survival of hemiarthroplasty versus total shoulder arthroplasty in osteoarthritis and rheumatoid arthritis

    Lapner PLC, Rollins MD, Netting C, Tuna M, Bader Eddeen A, van Walraven C. Bone Joint J. 2019; 101-B(4):454-60. Epub 2019 Mar 31. DOI: 10.1302/0301-620X.101B4.BJR-2018-0620.R1.

  • September 2019

    • Risks of preoperative anemia in women undergoing elective hysterectomy and myomectomy
    • Sex-specific differences in end-of-life burdensome interventions and antibiotic therapy in nursing home residents with advanced dementia
    • Chronic physical conditions and risk for perinatal mental illness: a population-based retrospective cohort study
    • Physician availability in long-term care and resident hospital transfer: a retrospective cohort study
    ICES in the News
    • Population-based secular trends in lower extremity amputation for diabetes and peripheral artery disease
    • Opioid prescribing after surgery in the United States, Canada and Sweden
    • Sex differences in long‐term survival after major cardiac surgery: a population‐based cohort study
    • Trends in the use of cardiac imaging for patients with heart failure in Canada
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    • Days spent at home in the last 6 months of life: a quality indicator of end of life care in patients with hematologic malignancies
    • Trends in use of medical imaging in US health care systems and in Ontario, Canada, 2000-2016
    • Ambient air pollution and the risk of atrial fibrillation and stroke: a population-based cohort study
    • Incidence of hospitalizations and emergency department visits for herpes zoster in immunocompromised and immunocompetent adults in Ontario, Canada, 2002-2016
    • Understanding those overdue for cancer screening by five years or more: a retrospective cohort study in Ontario, Canada
    • Impact of the 2016 policy change on the delivery of Medscheck services in Ontario: an interrupted time-series analysis
    • The impact of hospital harm on length of stay, costs of care and length of person-centred episodes of care: a retrospective cohort study
  • Does the frequency of routine follow-up after curative treatment for head-and-neck cancer affect survival?

    Hall SF, Owen T, Griffiths RJ, Brennan K. Curr Oncol. 2019; 26(5):295-306. Epub 2019 Oct 1.

  • 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
    • The impact of ductal carcinoma in situ on health services utilization

      Paszat L, Sutradhar R, Rakovitch E. Breast Cancer Res Treat. 2020; 182(1):159–68. Epub 2020 May 8. DOI:

    • March 2021

      • Thank you to everyone who attended our virtual research symposium!
      • Association between anesthesiologist volume and short-term outcomes in complex gastrointestinal cancer surgery
      • Access to cancer surgery in a universal health care system during the COVID-19 pandemic
      • Factors associated with waiting time to breast cancer diagnosis among symptomatic breast cancer patients: a population-based study from Ontario, Canada
      • Mental Health and Addictions System Performance in Ontario: 2021 Scorecard
      ICES in the News
      • Comparison of palliative care delivery in the last year of life between adults with terminal noncancer illness or cancer
      • Testing, infection and complication rates of COVID-19 among people with a recent history of homelessness in Ontario, Canada: a retrospective cohort study
      • Shifts in office and virtual primary care during the early COVID-19 pandemic in Ontario, Canada
      • COVID-19 in Ontario: Notable findings for the week of March 7-13, 2021
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      • Does housing improve health care utilization and costs? A longitudinal analysis of health administrative data linked to a cohort of individuals with a history of homelessness
      • Overall health care cost during the year following diagnosis of colorectal cancer stratified by history of colorectal evaluative procedures
      • Injury-related deaths in the Ontario provincial trauma system: a retrospective population-based cohort analysis
      • Concordance between high antibiotic prescribing and high opioid prescribing among primary care physicians: a cross-sectional study
      • Health care costs associated with chronic hepatitis C virus infection in Ontario, Canada: a retrospective cohort study
      • Rates of rebleeding, thrombosis and mortality associated with resumption of anticoagulant therapy after anticoagulant-related bleeding
      • Association between continuity of care and subsequent diagnosis of multimorbidity in Ontario, Canada from 2001-2015: a retrospective cohort study
      • A population-based cohort study of respiratory disease and long-term exposure to iron and copper in fine particulate air pollution and their combined impact on reactive oxygen species generation in human lungs
    • Colonic stents for colorectal cancer are seldom used and mainly for palliation of obstruction: a population-based study

      Borowiec AM, Wang CSK, Yong E, Law C, Coburn N, Sutradhar R, Baxter N, Paszat L, Tinmouth J. Can J Gastroenterol Hepatol. 2016; 2016:1945172. Epub 2016 Mar 29.

    • May 2021

      • Variable impact of COVID-19 on urgent intervention in Ontario
      • Comparison of childhood asthma incidence in 3 neighbouring cities in southwestern Ontario: a 25‑year longitudinal cohort study
      • Suicide and self-harm in adult survivors of critical illness: population based cohort study
      • Delay of pregnancy among physicians vs nonphysicians
      ICES in the News
      • Individual and social determinants of SARS-CoV-2 testing and positivity in Ontario, Canada: a population-wide study
      • Perinatal outcomes during the COVID-19 pandemic in Ontario, Canada
      • COVID-19 in Ontario: Highlights for the week of May 2–8, 2021
      • Association between bariatric surgery and major adverse diabetes outcomes in patients with diabetes and obesity
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      • Risk factors for outbreaks of SARS-CoV-2 infection at retirement homes in Ontario, Canada: a population-level cohort study
      • The requirement for surgery and subsequent 30-day mortality in patients with COVID-19
      • Is coronavirus disease 2019 associated with indicators of long-term bladder dysfunction?
      • Sex differences in multimorbidity and polypharmacy trends: a repeated cross-sectional study of older adults in Ontario, Canada
      • Health care utilization in medically complex people living with HIV before and after admission to an HIV-specific community facility: a pre–post comparison study
      • Health care costs of rheumatoid arthritis: a longitudinal population study
      • Health care utilisation and costs associated with different treatment protocols for newly diagnosed childhood acute lymphoblastic leukaemia: a population-based study in Ontario, Canada
      • Derivation and validation of a two-variable index to predict 30-day outcomes following heart failure hospitalization
    • April 2022

      • ICES 2022 Research Forum
      • Risk of suicide death following electroconvulsive therapy treatment for depression: a propensity score-weighted, retrospective cohort study in Canada
      • Follow-up after post-partum psychiatric emergency department visits: an equity-focused population-based study in Canada
      ICES in the News
      • Cancer risk and mortality in patients with kidney disease: a population-based cohort study
      • Vaccine effectiveness against SARS-CoV-2 infection and severe outcomes among individuals with immune-mediated inflammatory diseases tested between March 1 and Nov 22, 2021, in Ontario, Canada: a population-based analysis
      • Association of patient-reported outcomes with subsequent nonfatal self-injury after a new cancer diagnosis
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      • Virtual care use during the COVID-19 pandemic and its impact on healthcare utilization in patients with chronic disease: a population-based repeated cross-sectional study
      • Impact of the COVID-19 pandemic on the prevalence of opioid agonist therapy discontinuation in Ontario, Canada: a population-based time series analysis
      • Hospitalizations during the COVID-19 pandemic among recently homeless individuals: a retrospective population-based matched cohort study
      • Hip arthroscopy utilization and reoperation rates in Ontario: a population-based analysis comparing different age cohorts
      • Survival effects of time to surgery for stage I lung cancer: a population-based study
      • Assessment of age and sex differences in risk of 1-year mortality after emergency department visits caused by alcohol use
      • Regional differences in access to direct-acting antiviral treatments for hepatitis C across Ontario: a cross-sectional study
      • Troponin testing after noncardiac surgery: a population-based historical cohort study on variation and factors associated with testing in Ontario
    • Appropriateness of primary total hip and knee replacements in regions of Ontario with high and low utilization rates

      van Walraven C, Paterson JM, Kapral M, Chan B, Bell M, Hawker G, Gollish J, Schatzker J, Williams JI, Naylor CD. CMAJ. 1996; 155(6):697-706.

    • Removal or revision of vaginal mesh used for the treatment of stress urinary incontinence

      Welk B, Al-Hothi H, Winick-Ng J. JAMA Surg. 2015; 150(12):1167-75. Epub 2015 Sep 9.

    • Association between operator specialty and outcomes after carotid artery revascularization

      Hussain MA, Mamdani M, Tu JV, Saposnik G, Salata K, Bhatt DL, Verma S, Al-Omran M. J Vasc Surg. 2018; 67(2):478-89.e6. Epub 2017 Aug 17.

    • Population-level symptom assessment following pancreaticoduodenectomy for adenocarcinoma

      Tung S, Davis LE, Hallet J, Mavros MN, Mahar AL, Bubis LD, Hammad A, Zhao H, Earle CC, Barbera L, Coburn NG, Siqqidui M, Li Q, Elmi M, Shin E, Hsieh E, Goyert N; the Pancreas Cancer Population Outcomes Research Group. JAMA Surg. 2019: e193348. Epub 2019 Sep 4. DOI: 10.1001/jamasurg.2019.3348.

    • How do common comorbidities modify the association of frailty with survival after elective noncardiac surgery? A population-based cohort study

      Hui Y, van Walraven C, McIsaac DI. Anesth Analg. 2019; 129(6):1699-706. Epub 2019 Aug 22. DOI:

    • Association of bilateral salpingo-oophorectomy with all cause and cause specific mortality: population based cohort study

      Cusimano MC, Chiu M, Ferguson SE, Moineddin R, Aktar S, Liu N, Baxter NN. BMJ. 2021; 375:e067528. Epub 2021 Dec 9. DOI:

    • Health data in Ontario: taking stock and moving ahead

      Iron K. Healthc Q. 2006; 9(3):24-6.

    • Randomized trial of a patient decision aid for choice of surgical treatment for breast cancer

      Goel V, Sawka CA, Thiel EC, Gort EH, O'Connor AM. Med Decis Making. 2001; 21(1):1-6.

    • January 2018

      Call for abstracts: IPDLN 2018 Conference
      • Diabetes risk in childhood cancer survivors: a population-based study
      • Association between handover of anesthesia care and adverse postoperative outcomes among patients undergoing major surgery
        ICES in the News
        • Acute myocardial infarction after laboratory-confirmed influenza infection
        • Effect of air quality alerts on human health: a regression discontinuity analysis in Toronto, Canada
        ICES Top 17 of '17
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        • Temporal trends in mental health service utilization across outpatient and acute care sectors: a population-based study from 2006 to 2014
        • The economic burden of cancer care in Canada: a population-based cost study
        • Elevated incidence of atrial fibrillation and stroke in patients with atrial flutter – a population-based study
        • The relation between food insecurity and mental health care service utilization in Ontario
        • Intergenerational abortion tendency between mothers and teenage daughters: population based cohort study
        • The impact of diabetes on breast cancer treatments and outcomes: a population-based study
        • Predictors of specialized pediatric palliative care involvement and impact on patterns of end-of-life care in children with cancer
      • February 2018

        • People who receive physician visits at home in last year of life are less likely to die in hospital
        • 3 in 4 Ontarians hospitalized for psychiatric care are admitted involuntarily
          ICES in the News
          • Single fathers at increased risk of premature death, perhaps due to unhealthy lifestyle
          • Childhood cancer survivors found to be at higher risk of mental illness
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          • Patterns of methadone maintenance treatment provision in Ontario: Policy success or pendulum excess?
          • Health services burden of undiagnosed and overdiagnosed COPD
          • T-cell receptor excision circle levels and safety of paediatric immunization: a population-based self-controlled case series analysis
          • Association between newborn metabolic profiles and pediatric kidney disease
          • Association of polypharmacy with survival, complications and healthcare resource use after elective non-cardiac surgery: a population-based cohort study
          • Increasing incidence and prevalence of World Health Organization groups 1 to 4 pulmonary hypertension: a population-based cohort study in Ontario, Canada
          • Assessing covariate balance when using the generalized propensity score with quantitative or continuous exposures