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Publication Results (67)

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  • Health outcomes associated with emergency department visits by adolescents for self-harm: a propensity-matched cohort study

    Gardner W, Pajer K, Cloutier P, Currie L, Colman I, Zemek R, Hatcher S, Lima I, Cappelli M. CMAJ. 2019; 191(44):E1207-16. Epub 2019 Nov 4. DOI:

  • Preventing deaths in the Canadian military

    Tien HCN, Acharya S, Redelmeier DA. Am J Prev Med. 2010; 38(3):331-9.

  • The impact of rural residence on medically serious medicinal self-poisonings

    Rhodes A, Bethell J, Jaakkimainen RL, Thurlow J, Spence J, Links PS, Streiner DL. Gen Hosp Psychiatry. 2008; 30(6):552-60. Epub 2008 Aug 22.

  • Repetition of intentional drug overdose: a population-based study

    Finkelstein Y, Macdonald EM, Hollands S, Sivilotti MLA, Hutson JR, Mamdani MM, Koren G, Juurlink DN; Canadian Drug Safety and Effectiveness Research Network (CDSERN). Clin Toxicol (Phila). 2016; 54(7):585-9. Epub 2016 May 12

  • Self-harm emergencies after bariatric surgery: a population-based cohort study

    Bhatti JA, Nathens AB, Thiruchelvam D, Grantcharov T, Goldstein BI, Redelmeier DA. JAMA Surg. 2016; 151(3):226-32. Epub 2015 Oct 7.

  • Age-sex differences in medicinal self-poisonings: a population-based study of deliberate intent and medical severity

    Rhodes AE, Bethell J, Spence J, Links PS, Streiner DL, Jaakkimainen RL. Soc Psychiatry Psychiatr Epidemiol. 2008; 43(8):642-52. Epub 2008 May 29.

  • A retrospective cohort study comparing non-fatal self-harm emergency department visits between Canadian veterans living in Ontario and matched civilians

    Mahar AL, Cramm H, Aiken AB, Whitehead M, Tien H, Fear NT, Kurdyak P. Int Rev Psychiatry. 2019; 31(1):25-33. Epub 2019 Apr 17. DOI: 10.1080/09540261.2019.1580685.

  • Identifying deliberate self-harm in emergency department data

    Bethell J, Rhodes AE. Health Rep. 2009; 20(2):35-42.

  • July 2016

    • Study of one million patients shows link between type 2 diabetes and many types of cancer
    • Home blood pressure monitoring may be driving unnecessary visits to ER
    • Concussion triples adult suicide risk, with rates highest following weekend concussions
    • Researchers find unexpected association between younger donor age, female sex and transfusion outcomes
    • New opioid use in adults with chronic obstructive pulmonary disease associated with increased risk of death
    • Study casts doubt on clinical significance of gadolinium brain deposits
    • First issue of Data and Discovery now available
    • Poorer children with diabetes have more adverse events using insulin pumps despite 24-hour support
    • Age, dementia, and long-term care residence are predictors of lower oral anticoagulant use for secondary stroke prevention
    • Older recipient age and female sex associated with increased fracture risk in kidney transplant recipients
  • June 2018

    Remembering Jack Tu
    • High-risk medications often re-prescribed after potentially serious drug effects
    • People with schizophrenia spectrum disorders account for more than 1 in 10 suicide deaths in Ontario
    • Women's risk of blood clots may be doubled in the six weeks following an abortion
      ICES in the News
      • Sex ratios at birth among second generation mothers of South Asian ethnicity in Ontario, Canada
      • Reporting and evaluating wait times for urgent hip fracture surgery in Ontario, Canada
      • Association of cataract surgery with traffic crashes
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      • The Mental Health of Adults with Developmental Disabilities in Ontario: Lessons from Administrative Health Data
      • Maternal and infant outcomes associated with lithium use in pregnancy
      • Family physician remuneration schemes and specialist referrals: quasi‐experimental evidence from Ontario, Canada
      • Serotonergic antidepressant use and morbidity and mortality among older adults with COPD
      • Evaluating the early impacts of delisting of high strength opioid on patterns of prescribing in Ontario
      • How are physicians delivering palliative care? A population-based retrospective cohort study describing the mix of generalist and specialist palliative care models in the last year of life
      • Hepatitis C testing, status and treatment among marginalized people who use drugs in an inner city setting: an observational cohort study
    • May 2019

      • Do-not-resuscitate and do-not-hospitalize orders in nursing homes: Who gets them and do they make a difference?
      • Nonsteroidal anti-inflammatory drug use and risk of acute kidney injury and hyperkalemia in older adults: a population-based study
      ICES in the News
      • Recent trends in child and youth emergency department visits because of pedestrian motor vehicle collisions by socioeconomic status in Ontario, Canada
      • Canada-wide health database to launch with federal funding
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      • Infective endocarditis hospitalizations and antibiotic prophylaxis rates before and after the 2007 American Heart Association guidelines revision
      • Trends in site of death and health care utilization at the end of life: a population-based cohort study
      • Cancer diagnosis and risk of suicide after accounting for prediagnosis psychiatric care: a matched‐cohort study of patients with incident solid‐organ malignancies
      • Predictors and variability of antibiotic prescribing amongst family physicians
      • The impact of the adoption of a patient rostering model on primary care access and continuity of care in urban family practices in Ontario, Canada
      • Comparing the high-dimensional propensity score for use with administrative data with propensity scores derived from high-quality clinical data
    • June 2019

      • Naloxone Distribution Across Ontario
      • Neighborhood material deprivation is associated with childhood asthma development
      • End-of-career practice patterns of primary care physicians in Ontario
      • Quality of primary care among individuals receiving treatment for opioid use disorder
      ICES Research Video
      • Recent trends in child and youth emergency department visits because of pedestrian motor vehicle collisions by socioeconomic status in Ontario, Canada
      ICES in the News
      • Association between statin use and risk of dementia after a concussion
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      • Low-value diagnostic imaging use in the pediatric emergency department in the United States and Canada
      • Suicide in Canadian veterans living in Ontario: a retrospective cohort study linking routinely collected data
      • Ethnic differences in prediabetes incidence among immigrants to Canada: a population-based cohort study
      • The primary care and other health system use of home care patients: a retrospective cohort analysis
      • A population profile of older adults with prescription encounters with nurse practitioners and family physicians in Ontario: a descriptive retrospective cohort study
      • Derivation and external validation of a scoring system for predicting fracture risk after ischemic stroke in a Canadian cohort
    • Effectiveness of early psychosis intervention: comparison of service users and nonusers in population-based health administrative data

      Anderson KK, Norman R, MacDougall A, Edwards J, Palaniyappan L, Lau C, Kurdyak P. Am J Psychiatry. 2018; 175(5):443-52. Epub 2018 Mar 2.

    • The effect of antidepressant warnings on prescribing trends in Ontario, Canada

      Kurdyak PA, Juurlink DN, Mamdani MM. Am J Public Health. 2007; 97(4):750-4. Epub 2007 Feb 28.

    • Predictors of psychiatric aftercare among formerly hospitalized adolescents

      Carlisle CE, Mamdani M, Schachar R, To T. Can J Psychiatry. 2012; 57(11):666-76.

    • October 2017

      • Chronic Obstructive Pulmonary Disease in Ontario
      • Impact of pneumococcal vaccination on pneumonia hospitalizations and related costs in Ontario
      • Gabapentin, opioids and the risk of opioid-related death

      ICES Research Video
      • Natasha Saunders on study showing one-third lower risk of suicide or self-harm among immigrant children and youth
      ICES in the News
      • Antipsychotics common for adults with intellectual and developmental disabilities
      • Association between immigrant status and end-of-life care in Ontario, Canada
      • Effectiveness of a financial incentive to physicians for timely follow-up after hospital discharge
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      • Impact of restricting diagnostic imaging reimbursement for uncomplicated low back pain in Ontario: a population-based interrupted time series analysis
      • Temporal trends in cardiovascular disease risk factor profiles in a population-based schizophrenia sample: a repeat cross-sectional study
      • Comparative safety of direct oral anticoagulants and warfarin in venous thromboembolism: multicentre, population based, observational study
      • False-positive newborn screening for cystic fibrosis and health care use
      • Economic impact of subsequent depression in patients with a new diagnosis of stable angina: a population-based study
      • Are we Choosing Wisely in lymphoma? Excessive use of surveillance CT imaging in patients with diffuse large B-cell lymphoma (DLBCL) in long-term remission
      • Real-world health care utilization and effectiveness of omalizumab for the treatment of severe asthma
      • Effect of preoperative geriatric evaluation on outcomes after elective surgery: a population-based study
    • November 2017

      Call for abstracts: IPDLN 2018 Conference
      • Two-thirds of children with concussions not receiving medical follow-ups
      • People with developmental disabilities and mental illness have twice the risk of hospital readmissions
      • Inhaled corticosteroids do not increase risk of fracture in children with asthma
      • People with mental illness or addictions have higher health care needs and costs
      ICES in the News
      • Hip fracture surgery after more than 24 hours associated with increased risk of death and other complications
      • Direct medical costs of motorcycle crashes in Ontario
      • Flu vaccine prevents hospitalization in children
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      • Big data and population health: focusing on the health impacts of the social, physical, and economic environment
      • Indigenous health data and the path to healing
      • Derivation and external validation of prediction models for advanced chronic kidney disease following acute kidney injury
      • Ethnic differences in mental health and race-based data collection
      • Predicting psychiatric readmission: sex-specific models to predict 30-day readmission following acute psychiatric hospitalization
      • The medical care of male and female youth who die by suicide: a population-based case control study
      • Mortality in infants affected by preterm birth and severe small-for-gestational age birth weight
      • Increased coronary heart disease and stroke hospitalisations from ambient temperatures in Ontario
      • Changes in the dispensing of opioid medications in Canada following the introduction of a tamper-deterrent formulation of long-acting oxycodone
      • Variations in use of optimal medical therapy in patients with nonobstructive coronary artery disease

    • July 2019

      • Changing rates of self-harm and mental disorders by sex in youths presenting to Ontario emergency departments: repeated cross-sectional study
      • Same-day discharge after elective percutaneous coronary interventions in Ontario, Canada
      • Management of sleep disorders in community-dwelling older women and men at the time of diagnosis
      • The risk of cardiovascular events on cannabis’ highest day
      ICES in the News
      • Interaction between neighborhood walkability and traffic-related air pollution on hypertension and diabetes: the CANHEART cohort
      • Introduction of anti-TNF therapy has not yielded expected declines in hospitalisation and intestinal resection rates in inflammatory bowel diseases: a population-based interrupted time series study
      • Geographic Variation in Primary Care Need, Service Use and Providers in Ontario, 2015/16
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      • Risk of hospitalization for serious adverse gastrointestinal events associated with sodium polystyrene sulfonate use in patients of advanced age
      • Primary care performance of alternatively licenced physicians in Ontario, Canada: a cross-sectional study using administrative data
      • Adherence to predefined dietary patterns and risk of developing type 2 diabetes in the Canadian adult population
      • The urine culturing cascade: variation in nursing home urine culturing and association with antibiotic use and C. difficile infection
      • A challenge to all. A primer on inter-country differences of high-need, high-cost patients
      • Suicide and self-harm in recent immigrants in Ontario, Canada: a population-based study
    • Emergency department presentations for self-harm among Ontario youth

      Bethell J, Bondy SJ, Lou WY, Guttmann A, Rhodes AE. Can J Public Health. 2013; 104(2):e124-30.

    • November 2019

      • Association between neighborhood walkability and predicted 10-year cardiovascular disease risk: the Cardiovascular Health in Ambulatory Care Research Team (CANHEART) cohort
      • Risk of involuntary admission among first-generation ethnic minority groups with early psychosis: a retrospective cohort study using health administrative data
      • Perinatal outcomes for untreated women with gestational diabetes by IADPSG criteria: a population-based study
      • Hypertrophic cardiomyopathy-related sudden cardiac death in young people in Ontario
      Research Video
      • One-year home-time and mortality after thrombolysis compared with nontreated patients in a propensity-matched analysis
      ICES in the News
      • The uptake of the pharmacy-dispensed naloxone kit program in Ontario: A population-based study
      • An opioid prescription for men undergoing minor urologic surgery is associated with an increased risk of new persistent opioid use
      • Clinical effectiveness of cardiac noninvasive diagnostic testing in patients discharged from the emergency department for chest pain
      • Uptake of colorectal cancer screening by physicians is associated with greater uptake by their patients
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      • 90-90-90 for everyone? Access to HIV care and treatment for people with HIV who experience imprisonment in Ontario, Canada
      • Association between angiotensin-converting enzyme inhibitors, angiotensin receptor blockers, and suicide
      • Potential impact of changes in administrative database coding methodology on research and policy decisions: an example from the Ontario Health Insurance Plan
      • Pitfalls in measuring temporal trends for late diagnosis of viral hepatitis
      • Incremental healthcare utilisation and costs among new senior high-cost users in Ontario, Canada: a retrospective matched cohort study
      • Identifying Ontario geographic regions to assess adults who present to hospital with laboratory-defined conditions: a descriptive study
      • Inequity in access to transcatheter aortic valve replacement: a pan-Canadian evaluation of wait-times
    • July 2020

      • Cost-effectiveness of investment in end-of-life home care to enable death in community settings
      • Association between palliative care and healthcare outcomes among adults with terminal non-cancer illness: population based matched cohort study
      ICES in the News
      • Predictors of suicide at time of diagnosis in schizophrenia spectrum disorder: a 20-year total population study in Ontario, Canada
      • COVID-19 Laboratory Testing in Ontario: Patterns of Testing and Characteristics of Individuals Tested, as of April 30, 2020
      • Effect of academic detailing on promoting appropriate prescribing of antipsychotic medication in nursing homes: a cluster randomized clinical trial
      • Geographic Variation in Primary Care Need, Service Use and Providers in Ontario, 2015/16
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      • Cardiac intervention rates for older patients with acute myocardial infarction in the United States and Ontario, 2003–2013: a retrospective cohort study
      • Variability in patient sociodemographics, clinical characteristics, and healthcare service utilization among 107,302 treatment seeking smokers in Ontario: a cross-sectional comparison
      • Primary care reform and funding equity for mental health disorders in Ontario: a retrospective observational population-based study
      • Validation of a type 1 diabetes algorithm using electronic medical records and administrative healthcare data to study the population incidence and prevalence of type 1 diabetes in Ontario, Canada
      • Clinical effectiveness of cardiac noninvasive diagnostic testing in outpatients evaluated for stable coronary artery disease
      • Early operative management in patients with adhesive small bowel obstruction: population-based cost analysis
      • Trends in very early discharge from hospital for newborns under midwifery care in Ontario from 2003 to 2017: a retrospective cohort study
      • Machine learning for identifying medication-associated acute kidney injury
    • Mortality over 12 years of follow-up in people admitted to provincial custody in Ontario: a retrospective cohort study

      Kouyoumdjian FG, Kiefer L, Wobeser W, Gonzalez A, Hwang SW. CMAJ Open. 2016; 4(2):E153-61.

    • Adverse mental health outcomes in a population-based cohort of survivors of childhood cancer

      Nathan PC, Nachman A, Sutradhar R, Kurdyak P, Pole JD, Lau C, Gupta S. Cancer. 2018; 124(9):2045-57. Epub 2018 Feb 22.

    • Long-term mental health outcomes in mothers and siblings of children with cancer: a population-based, matched cohort study

      van Warmerdam J, Sutradhar R, Kurdyak P, Lau C, Pole JD, Nathan PC, Gupta S. J Clin Oncol. 2020; 22(2):232-40. Epub 2019 Sep 17. DOI:

    • Discharge and post-discharge outcomes of psychiatric inpatients with a lifetime history of exposure to interpersonal trauma: a population-based study

      Gatov E, Koziel N, Kurdyak P, Saunders NR, Chiu M, Lebenbaum M, Chen S, Vigod SN. Gen Hosp Psychiatry. 2020; June 8 [Epub ahead of print]. DOI:

    • A cohort study examining emergency department visits and hospital admissions among people who use drugs in Ottawa, Canada

      Kendall CE, Boucher LM, Mark AE, Martin A, Marshall Z, Boyd R, Oickle P, Diliso N, Pineau D, Renaud B, Rose T, LeBlanc S, Tyndall M, Lee OM, Bayoumi AM. Harm Reduct J. 2017; 14:16.

    • Deliberate self-poisoning in Ontario following the terrorist attacks of September 11, 2001

      Detsky ME, Sivilotti ML, Kopp A, Austin PC, Juurlink DN. JAMA. 2005; 294(15):1900-1.