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Publication Results (236)

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  • 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
  • Impact of the 2016 policy change on the delivery of Medscheck services in Ontario: an interrupted time-series analysis

    Shakeri A, Dolovich L, MacCallum L, Gamble JM, Zhou L, Cadarette SM. Pharmacy. 2019; 7(3):E115. Epub 2019 Aug 12. DOI: 10.3390/pharmacy7030115.

  • May 2020

    • COVID-19 Laboratory Testing in Ontario: Patterns of Testing and Characteristics of Individuals Tested, as of April 30, 2020
    • Population-based estimates of health care utilization and expenditures by adults during the last 2 years of life in Canada’s single-payer health system
    • Association between traumatic brain injury and prison charges: a population-based cohort study
    • Five-year risk of admission to long-term care home and death for older adults given a new diagnosis of dementia: a population-based retrospective cohort study
    • Emergency department use by pregnant women in Ontario: a retrospective population-based cohort study
    ICES in the News
    • Inequity in access to transcatheter aortic valve replacement: a pan-Canadian evaluation of wait-times
    • Physician-based availability of psychotherapy in Ontario: a population-based retrospective cohort study
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    • An international cohort study of birth outcomes associated with hospitalized acute respiratory infection during pregnancy
    • Urban green space and the risks of dementia and stroke
    • Diabetes-induced eye disease among First Nations people in Ontario: a longitudinal, population-based cohort study
    • Association between immigration status and acute stroke care: a retrospective study
    • Long-term survival and costs following extracorporeal membrane oxygenation in critically ill children—a population-based cohort study
    • Use of sodium–glucose cotransporter-2 inhibitors and risk of acute kidney injury in older adults with diabetes: a population-based cohort study
    • Impact of stopping trastuzumab in early breast cancer: a population-based study in Ontario, Canada
    • Preterm birth, unplanned hospital contact, and mortality in infants born to teenage mothers in five countries: an administrative data cohort study
  • September 2020

    • COVID-19 in immigrants, refugees and other newcomers in Ontario: characteristics of those tested and those confirmed positive, as of June 13, 2020
    • Assessment of health conditions and health service use among transgender patients in Canada
    • Describing differences among recent immigrants and long-standing residents waiting for long-term care: a population-based retrospective cohort study
    ICES in the News
    • A case-control study of the Sub-Acute care for Frail Elderly (SAFE) unit on hospital readmission, emergency department visits and continuity of post-discharge care
    • Low-density lipoprotein cholesterol and adverse cardiovascular events after percutaneous coronary intervention
    • Quality of antenatal care for women who experience imprisonment in Ontario, Canada
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    • Childhood food insecurity and incident diabetes: a longitudinal cohort study of 34 042 children in Ontario, Canada
    • Diagnosis of chronic hepatitis B peri‐complication: risk factors and trends over time
    • Outcomes after the regionalization of care for high-grade endometrial cancers: a population-based study
    • High risk of Clostridium difficile infection among spinal cord injured patients after the use of antibiotics commonly used to treat urinary tract infections
    • Kidney function and potassium monitoring after initiation of renin-angiotensin-aldosterone system blockade therapy and outcomes in 2 North American populations
    • Long-term survival after surgical or percutaneous revascularization in patients with diabetes and multivessel coronary disease
    • Prevalence and predictors of reincarceration after correctional center release: a population-based comparison of individuals with and without schizophrenia in Ontario, Canada
    • Uptake of the heart failure management incentive billing code by family physicians in Ontario, Canada: a retrospective cohort study
    • Reoperation cascade in postmastectomy breast reconstruction and its associated factors: results from a long‐term population‐based study
  • Temporal trends in sudden cardiac death in Ontario, Canada

    Shuvy M, Qiu F, Lau G, Koh M, Dorian P, Geri G, Lin S, Ko DT. Resuscitation. 2019; 136:1-7. Epub 2019 Jan 14.

  • October 2020

    • Residential greenspace in childhood reduces risk of pediatric inflammatory bowel disease: a population-based cohort study
    • Estimated surge in hospital and intensive care admission because of the coronavirus disease 2019 pandemic in the Greater Toronto Area, Canada: a mathematical modelling study
    • Modest increase in fertility consultations in female adolescents and young adults with lymphoma: a population-based study
    ICES in the News
    • Firearm-related injuries and deaths in Ontario, Canada, 2002-2016: a population-based study
    • Morbidity and mortality associated with prescription cannabinoid drug use in COPD
    • Medication discontinuation in adults with chronic obstructive pulmonary disease discharged from hospital: a population-based cohort study
    • Association between exposure to general versus regional anesthesia and risk of dementia in older adults
    • COVID-19 in long-term care homes in Ontario and British Columbia
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    • Drug utilization in Ontario during the COVID-19 pandemic
    • Heterogeneity in testing, diagnosis and outcome in SARS-CoV-2 infection across outbreak settings in the Greater Toronto Area, Canada: an observational study
    • Levothyroxine dose and risk of atrial fibrillation: a nested case-control study
    • Are anticholinergic medications used for overactive bladder associated with new onset depression? A population-based matched cohort study
    • Deconstructing the rise in mental health–related ED visits among children and youth in Ontario, Canada
    • One size does not fit all: diabetes prevalence among immigrants of the South Asian diaspora
    • Medical immunosuppression and outcomes in cutaneous melanoma: a population-based cohort study
    • Multiple arterial coronary bypass grafting is associated with greater survival in women
  • December 2020

    • Mortality among patients with frequent emergency department use for alcohol-related reasons in Ontario: a population-based cohort study
    • Association between ABO and Rh blood groups and SARS-CoV-2 infection or severe COVID-19 illness: a population-based cohort study
    • Diagnostic testing in long-term care and resident emergency department visits: a retrospective cohort study
    ICES in the News
    • COVID-19 in Ontario
    • Life expectancy and health-adjusted life expectancy in people with inflammatory bowel disease
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    • Association between neuraxial anaesthesia or general anaesthesia for lower limb revascularisation surgery in adults and clinical outcomes: population based comparative effectiveness study
    • Economic burden of epilepsy in children: a population-based matched cohort study in Canada
    • Combined associations of work and leisure time physical activity on incident diabetes risk
    • Mental health and addictions system performance in Ontario: an updated scorecard, 2009-2017
    • Higher-dose sitagliptin and the risk of congestive heart failure in older adults with CKD
    • Feminization of the rheumatology workforce: a longitudinal evaluation of patient volumes, practice sizes and physician remuneration
    • The LENT index predicts 30 day outcomes following hospitalization for heart failure
    • Sex-specific temporal trends in ambulatory heart failure incidence, mortality and hospitalisation in Ontario, Canada from 1994 to 2013: a population-based cohort study
  • January 2021

    • ICES Winter Forum
    • Testing, infection and complication rates of COVID-19 among people with a recent history of homelessness in Ontario, Canada: a retrospective cohort study
    • Impact of geography on care delivery and survival for noncurable pancreatic adenocarcinoma: a population-based analysis
    • Patient-reported symptom burden as a predictor of emergency department use and unplanned hospitalization in head and neck cancer: a longitudinal population-based study
    ICES in the News
    • A health care system besieged by COVID?
    • COVID-19 in Ontario
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    • Medication use and its impact on high-cost health care users among older adults: protocol for the population-based matched cohort HiCOSTT study
    • Quality and safety in long-term care in Ontario: the impact of language discordance
    • Over half of seniors who start oral bisphosphonate therapy are exposed for 3 or more years: novel rolling window approach and patterns of use
    • Statin exposure and risk of heart failure after anthracycline- or trastuzumab-based chemotherapy for early breast cancer: a propensity score-matched cohort study
    • Access to bariatric surgery among older patients in a publicly funded regionalized care system
    • Mental health services provision in primary care and emergency department settings: analysis of blended fee-for-service and blended capitation models in Ontario, Canada
    • Correlates of non-adherence to breast, cervical, and colorectal cancer screening among screen-eligible women: a population-based cohort study in Ontario, Canada
    • Effect of socio-demographic and health factors on the association between multimorbidity and acute care service use: population-based survey linked to health administrative data
  • Dialysis modality and mortality in heart failure: a retrospective study of incident dialysis patients

    Molnar AO, Bota SE, Garg AX, Ouédraogo A, Dixon SN, Naylor K, Oliver M, Sood MM. Cardiorenal Med. 2020; 10(6):452-61. Epub 2020 Nov 25. DOI:

  • Gestational diabetes and incident heart failure: a cohort study

    Echouffo-Tcheugui JB, Guan J, Retnakaran R, Shah BR. Diabetes Care. 2021; 44(10):2346-52. Epub 2021 Aug 12. DOI:

  • 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
  • Trends and factors associated with suicide deaths in older adults in Ontario Canada

    Novilla-Surette EMP, Shariff SZ, Le B, Booth RG. Can Geriatr J. 2022; 25(2):134-61. Epub 2022 Jun 1. DOI:

  • September 2022

    • Prepregnancy emergency department use and risks of severe maternal and neonatal morbidity in Canada
    • Changes in emergency department visits for cannabis hyperemesis syndrome following recreational cannabis legalization and subsequent commercialization in Ontario, Canada
    • Family physicians stopping practice during the COVID-19 pandemic in Ontario, Canada
    ICES in the News
    • Estimated effectiveness of COVID-19 vaccines against Omicron or Delta symptomatic infection and severe outcomes
    • Clinical outcomes and health care costs among people entering a safer opioid supply program in Ontario
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    • Initial healthcare costs for COVID-19 in British Columbia and Ontario, Canada: an inter-provincial population-based cohort study
    • Mode of conception and risk of spontaneous vs. provider-initiated preterm birth: population-based cohort study
    • Trends in quality indicators of end-of-life care for women with gynecologic malignancies in Ontario, Canada
    • Rates, predictive factors, and adverse outcomes of fusion surgery for lumbar degenerative disorders in Ontario, Canada between 2006 and 2015: a retrospective cohort study
    • Cognitive decline in long-term care residents before and during the COVID-19 pandemic in Ontario, Canada
    • Regional collaborative home-based palliative care and health care outcomes among adults with heart failure
    • Incidence and mortality of emergency general surgery conditions among solid-organ transplant recipients in Ontario, Canada: a population-based analysis
  • Comparative risk of harm associated with trazodone or atypical antipsychotic use in older adults with dementia: a retrospective cohort study

    Watt JA, Gomes T, Bronskill SE, Huang A, Austin PC, Ho JM, Straus SE. CMAJ. 2018; 190(47):E1376-83. Epub 2018 Nov 26.

  • The prevalence and health consequences of frailty in a population-based older home care cohort: a comparison of different measures

    Campitelli MA, Bronskill SE, Hogan DB, Diong C, Amuah JE, Gill S, Seitz D, Thavorn K, Wodchis WP, Maxwell CJ. BMC Geriatr. 2016; 16(1):133.

  • Long-term outcomes and healthcare utilization following critical illness – a population-based study

    Hill AD, Fowler RA, Pinto R, Herridge MS, Cuthbertson BH, Scales DC. Crit Care. 2016; 20(1):76.

  • Rehabilitation of older adults with dementia after hip fracture

    Seitz DP, Gill SS, Austin PC, Bell CM, Anderson GM, Gruneir A, Rochon PA. J Am Geriatr Soc. 2016; 64(1):47-54. Epub 2016 Jan 19.

  • Predictors and outcomes of dysphagia screening after acute ischemic stroke

    Joundi RA, Martino R, Saposnik G, Giannakeas V, Fang J, Kapral MK. Stroke. 2017; 48(4):900-6. Epub 2017 Mar 8.

  • Phase-specific health care costs of cervical cancer: estimates from a population-based study

    Liu N, Mittmann N, Coyte PC, Hancock-Howard R, Seung SJ, Earle CC. Am J Obstet Gynecol. 2016; 214(5):615.e1-11. Epub 2015 Nov 25.

  • Effects of cholinesterase inhibitors on postoperative outcomes of older adults with dementia undergoing hip fracture surgery

    Seitz DP, Gill SS, Gruneir A, Austin PC, Anderson G, Reimer CL, Rochon PA. Am J Geriatr Psychiatry. 2011; 19(9):803-13.

  • Risk of suicide after a concussion

    Fralick M, Thiruchelvam D, Tien HC, Redelmeier DA. CMAJ. 2016; 188(7):497-504. Epub 2016 Feb 8.

  • Economic analysis of Heart and Stroke Foundation of Ontario’s Hypertension Management Initiative

    de Oliveira C, Wijeysundera HC, Tobe SW, Lum-Kwong MM, Von Sychowski S, Wang X, Tu JV, Krahn MD. Clinicoecon Outcomes Res. 2012; 4:323-36. Epub 2012 Nov 13.

  • Incidence and economic burden of adverse drug reactions among elderly patients in Ontario emergency departments: a retrospective study

    Wu C, Bell CM, Wodchis WP. Drug Saf. 2012; 35(9):769-81. Epub 2012 Dec 13.

  • Antibiotic prescribing for nonbacterial acute upper respiratory infections in elderly persons

    Silverman M, Povitz M, Sontrop JM, Li L, Richard L, Cejic S, Shariff SZ. Ann Intern Med. 2017; 166(11):765-74. Epub 2017 May 9.

  • Costs of health care across primary care models in Ontario

    Laberge M, Wodchis WP, Barnsley J, Laporte A. BMC Health Serv Res. 2017; 17:511. Epub 2017 Aug 1.

  • Ezetimibe prescriptions in older Canadian adults after an acute myocardial infarction: a population-based cohort study

    Clemens KK, Shariff SZ, McArthur E, Hegele RA. Lipids Health Dis. 2018; 17:8. Epub 2018 Jan 8.

  • Effect of a brief emergency medicine education course on emergency department work intensity of family physicians

    Vaillancourt S, Schultz SE, Leaver C, Stukel TA, Schull MJ. CJEM. 2013; 15(1):34-41.

  • Assessing potentially inappropriate prescribing (PIP) and predicting patient outcomes in Ontario’s older population: a population-based cohort study applying subsets of the STOPP/START and Beers’ criteria in large health administrative databases

    Bjerre LM, Ramsay T, Cahir C, Ryan C, Halil R, Farrell B, Thavorn K, Catley C, Hawken S, Gillespie U, Manuel DG. BMJ Open. 2015; 5(11):e010146.

  • Examining exposure misclassification of oral bisphosphonate therapy and the associated fracture risk: a cohort study

    Burden AM, Gruneir A, Paterson JM, Cadarette SM. Adv Pharmacoepidemiol Drug Saf. 2015; 4:4.

  • Ontario's Emergency Department Process Improvement Program: the experience of implementation

    Rotteau L, Webster F, Salkeld E, Hellings C, Guttmann A, Vermeulen MJ, Bell RS, Zwarenstein M, Rowe BH, Nigam A, Schull MJ; ED Investigator Team. Acad Emerg Med. 2015; 22(6):720-9. Epub 2015 May 20.

  • Professional pharmacy services and patient complexity: an observational study

    Ignacy TA, Camacho X, Mamdani M, Juurlink D, Paterson M, Gomes T. J Pharm Pharm Sci. 2015; 18(5):863-70.

  • The impact of policies to reduce blood glucose test strip utilization and costs in Canada

    Gomes T, Martins D, Cheng L, Kratzer J, Juurlink DN, Shah BR, Mamdani MM, Paterson JM, Law MR. Can J Public Health. 2015; 106(4):e210-6.

  • Using an accumulation of deficits approach to measure frailty in a population of home care users with intellectual and developmental disabilities: an analytical descriptive study

    McKenzie K, Ouellette-Kuntz H, Martin L. BMC Geriatr. 2015; 15:170.

  • Outcomes among patients with direct enteral vs nasogastric tube placement after acute stroke

    Joundi RA, Saposnik G, Martino R, Fang J, Porter J, Kapral MK. Neurology. 2018; 90(7):e544-e552. Epub 2018 Jan 24.

  • Patterns of use for brand-name versus generic oral bisphosphonate drugs in Ontario over a 13-year period: a descriptive study

    Fraser LA, Albaum JM, Tadrous M, Burden AM, Shariff SZ, Cadarette SM. CMAJ Open. 2015; 3(1):E91-96.

  • Joint impact of dementia and frailty on healthcare utilisation and outcomes: a retrospective cohort study of long-stay home care recipients

    Maxwell CJ, Mondor L, Hogan DB, Campitelli MA, Bronskill SE, Seitz DP, Wodchis WP. BMJ Open. 2019; 9(6):e029523. Epub 2019 Jun 21. DOI: 10.1136/bmjopen-2019-029523.

  • Hospital-based cohort study to determine the association between home-time and disability after stroke by age, sex, stroke type, and study year in Canada

    Yu AYX, Fang J, Porter J, Austin PC, Smith EE, Kapral MK. BMJ Open. 2019; 9:e03137. Epub 2019 Nov 11.

  • Healthcare utilization costs of emerging adults with mood and anxiety disorders in an early intervention treatment program compared to a matched cohort

    John-Baptiste AA, Li L, Isaranuwatchai W, Osuch E, Anderson KK. Early Interv Psychiatry. 2019; 13(6):1439-46. Epub 2019 Jan 27. DOI:

  • Denosumab utilization among older adults in Ontario: patient characteristics, persistence with therapy, and return to therapy after an extended gap

    Ban JK, Hao BB, McCarthy L, Guilcher SJT, Cadarette SM. Osteoporos Int. 2019; 30(9):1865-72. Epub 2019 Jul 17. DOI:

  • High-cost patients and preventable spending: a population-based study

    de Oliveira C, Cheng J, Chan K, Earle CC, Krahn M, Mittmann N. J Natl Compr Canc Netw. 2020; 18(1):23-31. Epub 2020 Jan 1. DOI: