Works by Tu, Karen

Results: 152

Marginalized Neighborhoods and Health Outcomes in Younger Myocardial Infarction Survivors.

Published in:

JAMA Network Open, 2025, v. 8, n. 7, p. e2518826, doi. 10.1001/jamanetworkopen.2025.18826

By:

Akioyamen, Leo E.;
Sivaswamy, Atul;
Haldenby, Olivia;
Abdel-Qadir, Husam;
Sud, Maneesh;
Alter, David A.;
Atzema, Clare L.;
Austin, Peter C.;
Jackevicius, Cynthia A.;
Kapral, Moira K.;
Krumholz, Harlan M.;
Tu, Karen;
Wijeysundera, Harindra C.;
Ko, Dennis T.

Publication type:

Article

The association between care modality and hospitalizations and emergency department visits for ambulatory care-sensitive conditions during and after the pandemic in Ontario, Canada.

Published in:

PLoS ONE, 2025, v. 20, n. 7, p. 1, doi. 10.1371/journal.pone.0324805

By:

Mohammadrezaei, Dorsa;
Moineddin, Rahim;
Wang, Jun John;
Valencia, Javier Silva;
Lapadula, Maria Carla;
Ortigoza, Angela;
O'Neill, Braden;
Gronsbell, Jessica;
Butt, Debra A.;
Train, Anthony;
Gershon, Andrea S.;
Tu, Karen

Publication type:

Article

Adherence at 2 years with distribution of essential medicines at no charge: The CLEAN Meds randomized clinical trial.

Published in:

2021

By:

Persaud, Nav;
Bedard, Michael;
Boozary, Andrew;
Glazier, Richard H.;
Gomes, Tara;
Hwang, Stephen W.;
Juni, Peter;
Law, Michael R.;
Mamdani, Muhammad;
Manns, Braden;
Martin, Danielle;
Morgan, Steven G.;
Oh, Paul;
Pinto, Andrew D.;
Shah, Baiju R.;
Sullivan, Frank;
Umali, Norman;
Thorpe, Kevin E.;
Tu, Karen;
Laupacis, Andreas

Publication type:

journal article

A review of the use of propensity score methods with multiple treatment groups in the general internal medicine literature.

Published in:

Pharmacoepidemiology & Drug Safety, 2023, v. 32, n. 8, p. 817, doi. 10.1002/pds.5635

By:

Shurrab, Mohammed;
Ko, Dennis T.;
Jackevicius, Cynthia A.;
Tu, Karen;
Middleton, Allan;
Michael, Faith;
Austin, Peter C.

Publication type:

Article

Cerebral palsy in Canada, 2011-2031: results of a microsimulation modelling study of epidemiological and cost impacts.

Published in:

Promotion de la Santé et Prévention des Maladies Chroniques au Canada, 2020, v. 40, n. 2, p. 25, doi. 10.24095/hpcdp.40.2.01

By:

Amankwah, Nana;
Oskoui, Maryam;
Garner, Rochelle;
Bancej, Christina;
Manuel, Douglas G.;
Wall, Ron;
Finès, Philippe;
Bernier, Julie;
Tu, Karen;
Reimer, Kim

Publication type:

Article

Multiple sclerosis in Canada 2011 to 2031: results of a microsimulation modelling study of epidemiological and economic impacts.

Published in:

Promotion de la Santé et Prévention des Maladies Chroniques au Canada, 2017, v. 37, n. 2, p. 37

By:

Amankwah, Nana;
Marrie, Ruth Ann;
Bancej, Christina;
Garner, Rochelle;
Manuel, Douglas G.;
Wall, Ron;
Finès, Philippe;
Bernier, Julie;
Tu, Karen;
Reimer, Kim

Publication type:

Article

Identifying individuals with physician-diagnosed chronic obstructive pulmonary disease in primary care electronic medical records: a retrospective chart abstraction study.

Published in:

NPJ Primary Care Respiratory Medicine, 2017, p. 1, doi. 10.1038/s41533-017-0035-9

By:

Lee, Theresa M.;
Tu, Karen;
Wing, Laura L.;
Gershon, Andrea S.

Publication type:

Article

Weight status of children and adolescents with autism spectrum disorder: A cross‐sectional analysis of primary care electronic medical records and linked health administrative datasets in Ontario, Canada.

Published in:

Pediatric Obesity, 2025, v. 20, n. 6, p. 1, doi. 10.1111/ijpo.70000

By:

Kinlin, Laura M.;
Saunders, Natasha R.;
Carsley, Sarah;
Keown‐Stoneman, Charles;
Tu, Karen;
Zwaigenbaum, Lonnie;
Birken, Catherine S.

Publication type:

Article

Validation of the European SCORE2 models in a Canadian primary care cohort.

Published in:

European Journal of Preventive Cardiology, 2024, v. 31, n. 6, p. 668, doi. 10.1093/eurjpc/zwad352

By:

Sud, Maneesh;
Sivaswamy, Atul;
Austin, Peter C;
Abdel-Qadir, Husam;
Anderson, Todd J;
Khera, Rohan;
Naimark, David M J;
Lee, Douglas S;
Roifman, Idan;
Thanassoulis, George;
Tu, Karen;
Wijeysundera, Harindra C;
Ko, Dennis T

Publication type:

Article

Prescriptions for Estrogen Replacement Therapy in Ontario Before and After Publication of the Women's Health Initiative Study.

Published in:

JAMA: Journal of the American Medical Association, 2003, v. 289, n. 24, p. 3241, doi. 10.1001/jama.289.24.3241

By:

Austin, Peter C.;
Mamdani, Muhammad M.;
Tu, Karen;
Jaakkimainen, Liisa

Publication type:

Article

Risk for Stroke After Newly Diagnosed Atrial Fibrillation During Hospitalization for Other Primary Diagnoses: A Retrospective Cohort Study.

Published in:

Annals of Internal Medicine, 2025, v. 178, n. 6, p. 765, doi. 10.7326/ANNALS-24-01967

By:

Abdel-Qadir, Husam;
Gunn, Madison;
Fang, Jiming;
Odugbemi, Tomi;
Jeong, Irene;
Austin, Peter C.;
Dorian, Paul;
Jackevicius, Cynthia A.;
Lee, Douglas S.;
Singh, Sheldon M.;
Tu, Karen;
Ko, Dennis T.

Publication type:

Article

Development and Validation of the CANHEART Population-Based Laboratory Prediction Models for Atherosclerotic Cardiovascular Disease.

Published in:

Annals of Internal Medicine, 2023, v. 176, n. 12, p. 1638, doi. 10.7326/M23-1345

By:

Sud, Maneesh;
Sivaswamy, Atul;
Austin, Peter C.;
Anderson, Todd J.;
Naimark, David M.J.;
Farkouh, Michael E.;
Lee, Douglas S.;
Roifman, Idan;
Thanassoulis, George;
Tu, Karen;
Udell, Jacob A.;
Wijeysundera, Harindra C.;
Ko, Dennis T.

Publication type:

Article

Patient visits and prescriptions for attention-deficit/hyperactivity disorder from 2017–2021: Impacts of COVID-19 pandemic in primary care.

Published in:

PLoS ONE, 2023, v. 18, n. 3, p. 1, doi. 10.1371/journal.pone.0281307

By:

Butt, Debra A.;
Stephenson, Ellen;
Kalia, Sumeet;
Moineddin, Rahim;
Tu, Karen

Publication type:

Article

Improving stroke prevention therapy for patients with atrial fibrillation in primary care: protocol for a pragmatic, cluster-randomized trial.

Published in:

2016

By:

Lee, Theresa M;
Ivers, Noah M;
Bhatia, Sacha;
Butt, Debra A;
Dorian, Paul;
Jaakkimainen, Liisa;
Leblanc, Kori;
Legge, Dan;
Morra, Dante;
Valentinis, Alissia;
Wing, Laura;
Young, Jacqueline;
Tu, Karen

Publication type:

journal article

Assessing the validity of using administrative data to identify patients with epilepsy.

Published in:

Epilepsia (Series 4), 2014, v. 55, n. 2, p. 335, doi. 10.1111/epi.12506

By:

Tu, Karen;
Wang, Myra;
Jaakkimainen, R. Liisa;
Butt, Debra;
Ivers, Noah M.;
Young, Jacqueline;
Green, Diane;
Jetté, Nathalie

Publication type:

Article

Infant feeding practices within a large electronic medical record database.

Published in:

2018

By:

Bartsch, Emily;
Park, Alison L.;
Young, Jacqueline;
Ray, Joel G.;
Tu, Karen

Publication type:

journal article

Surveillance of ischemic heart disease should include physician billing claims: population-based evidence from administrative health data across seven Canadian provinces.

Published in:

BMC Cardiovascular Disorders, 2013, v. 13, n. 1, p. 1, doi. 10.1186/1471-2261-13-88

By:

Robitaille, Cynthia;
Bancej, Christina;
Dai, Sulan;
Tu, Karen;
Rasali, Drona;
Blais, Claudia;
Plante, Céline;
Smith, Mark;
Svenson, Lawrence W.;
Reimer, Kim;
Casey, Jill;
Puchtinger, Rolf;
Johansen, Helen;
Gurevich, Yana;
Waters, Chris;
Lix, Lisa M.;
Hude Quan

Publication type:

Article

Surveillance of ischemic heart disease should include physician billing claims: population-based evidence from administrative health data across seven Canadian provinces.

Published in:

2013

By:

Robitaille, Cynthia;
Bancej, Christina;
Dai, Sulan;
Tu, Karen;
Rasali, Drona;
Blais, Claudia;
Plante, Céline;
Smith, Mark;
Svenson, Lawrence W;
Reimer, Kim;
Casey, Jill;
Puchtinger, Rolf;
Johansen, Helen;
Gurevich, Yana;
Waters, Chris;
Lix, Lisa M;
Quan, Hude

Publication type:

journal article

Differences in growth of Canadian children compared to the WHO 2006 Child Growth Standards.

Published in:

2017

By:

Park, Alison L.;
Tu, Karen;
Ray, Joel G.;
Babaran‐Henfrey, Kathlyn;
Bartsch, Emily;
Berger, Howard;
Campbell, Douglas;
Chiu, Maria;
De Souza, Leanne R.;
Guttmann, Astrid;
Handa, Manavi;
Longo, Christopher;
Maguire, Jonathon;
Meloche, James;
Melamed, Nir;
Mousmanis, Patricia;
Roukema, Henry;
Roy, Jennifer;
Sgro, Michael;
Smith, Graeme N.

Publication type:

journal article

Health service utilization in immigrants with multiple sclerosis.

Published in:

PLoS ONE, 2020, v. 15, n. 7, p. 1, doi. 10.1371/journal.pone.0234876

By:

Rotstein, Dalia L.;
Marrie, Ruth Ann;
Tu, Karen;
Schultz, Susan E.;
Fung, Kinwah;
Maxwell, Colleen J.

Publication type:

Article

Stroke risk in women with atrial fibrillation.

Published in:

European Heart Journal, 2024, v. 45, n. 2, p. 104, doi. 10.1093/eurheartj/ehad508

By:

Buhari, Hifza;
Fang, Jiming;
Han, Lu;
Austin, Peter C;
Dorian, Paul;
Jackevicius, Cynthia A;
Yu, Amy Y X;
Kapral, Moira K;
Singh, Sheldon M;
Tu, Karen;
Ko, Dennis T;
Atzema, Clare L;
Benjamin, Emelia J;
Lee, Douglas S;
Abdel-Qadir, Husam

Publication type:

Article

The Association Between High and Unnecessary Antibiotic Prescribing: A Cohort Study Using Family Physician Electronic Medical Records.

Published in:

Clinical Infectious Diseases, 2021, v. 72, n. 9, p. e345, doi. 10.1093/cid/ciaa1139

By:

Kitano, Taito;
Langford, Bradley J;
Brown, Kevin A;
Pang, Andrea;
Chen, Branson;
Garber, Gary;
Daneman, Nick;
Tu, Karen;
Leung, Valerie;
Candido, Elisa;
Wu, Julie Hui-Chih;
Hwee, Jeremiah;
Silverman, Michael;
Schwartz, Kevin L

Publication type:

Article

Derivation and External Validation of a Clinical Model to Predict Heart Failure Onset in Patients With Incident Diabetes.

Published in:

2022

By:

Sun, Louise Y.;
Zghebi, Salwa S.;
Eddeen, Anan Bader;
Liu, Peter P.;
Lee, Douglas S.;
Tu, Karen;
Tobe, Sheldon W.;
Kontopantelis, Evangelos;
Mamas, Mamas A.

Publication type:

journal article

Identifying diabetes cases from administrative data: a population-based validation study.

Published in:

2018

By:

Lipscombe, Lorraine L;
Hwee, Jeremiah;
Webster, Lauren;
Shah, Baiju R;
Booth, Gillian L;
Tu, Karen

Publication type:

journal article

End-user support for a primary care electronic medical record: a qualitative case study of a vendor's perspective.

Published in:

Informatics in Primary Care, 2012, v. 20, n. 3, p. 185

By:

Shachak, Aviv;
Barnsley, Jan;
Montgomery, Catherine;
Tu, Karen;
Jadad, Alejandro R.;
Lemieux-Charles, Louise

Publication type:

Article

Understanding end-user support for health information technology: a theoretical framework.

Published in:

Informatics in Primary Care, 2011, v. 19, n. 3, p. 169

By:

Shachak, Aviv;
Barnsley, Jan;
Tu, Karen;
Jadad, Alejandro R.

Publication type:

Article

Quality and continuity of information between primary care physicians and rheumatologists.

Published in:

BMC Rheumatology, 2019, v. 3, n. 1, p. N.PAG, doi. 10.1186/s41927-019-0067-6

By:

Wong, Jenna;
Tu, Karen;
Bernatsky, Sasha;
Jaakkimainen, Liisa;
Thorne, J. Carter;
Ahluwalia, Vandana;
Paterson, J. Michael;
Widdifield, Jessica

Publication type:

Article

Quality and continuity of information between primary care physicians and rheumatologists.

Published in:

BMC Rheumatology, 2019, v. 3, n. 1, p. N.PAG, doi. 10.1186/s41927-019-0067-6

By:

Wong, Jenna;
Tu, Karen;
Bernatsky, Sasha;
Jaakkimainen, Liisa;
Thorne, J. Carter;
Ahluwalia, Vandana;
Paterson, J. Michael;
Widdifield, Jessica

Publication type:

Article

Measuring chronic obstructive pulmonary disease (COPD) quality indicators using primary care electronic medical records (EMRs) in Ontario, Canada.

Published in:

Canadian Journal of Respiratory, Critical Care, & Sleep Medicine, 2022, v. 6, n. 3, p. 169, doi. 10.1080/24745332.2021.1913079

By:

Lee, Theresa M.;
Tu, Karen;
Ivers, Noah M.;
Barnsley, Jan;
Gershon, Andrea S.

Publication type:

Article

Development of quality indicators for chronic obstructive pulmonary disease (COPD): A modified RAND appropriateness method.

Published in:

Canadian Journal of Respiratory, Critical Care, & Sleep Medicine, 2019, v. 3, n. 1, p. 30, doi. 10.1080/24745332.2018.1476030

By:

Gershon, Andrea S.;
Mecredy, Graham C.;
Aaron, Shawn D.;
Camp, Pat G.;
Tu, Karen;
Hernandez, Paul;
To, Teresa

Publication type:

Article

Time Trends of the Incidence, Prevalence, and Mortality of Parkinsonism.

Published in:

Canadian Journal of Neurological Sciences, 2019, v. 46, n. 2, p. 184, doi. 10.1017/cjn.2018.387

By:

Wong, Jessica J.;
Kwong, Jeffrey C.;
Tu, Karen;
Butt, Debra A.;
Copes, Ray;
Wilton, Andrew S.;
Murray, Brian J.;
Kopp, Alexander;
Chen, Hong

Publication type:

Article

The quality of diabetes care among cancer survivors: a retrospective cohort study.

Published in:

Diabetic Medicine, 2021, v. 38, n. 6, p. 1, doi. 10.1111/dme.14538

By:

Liang, Xinyun;
Etches, Jacob;
Pinzaru, Bogdan;
Tu, Karen;
Jaakkimainen, Liisa;
Lipscombe, Lorraine

Publication type:

Article

Changes in prescribing patterns following publication of the ALLHAT trial.

Published in:

2004

By:

Austin PC;
Mamdani MM;
Tu K;
Zwarenstein M;
Austin, Peter C;
Mamdani, Muhammad M;
Tu, Karen;
Zwarenstein, Merrick

Publication type:

Letter

RESEARCH LETTERS Changes in Prescribing Patterns Following Publication of the ALLHAT Trial.

Published in:

JAMA: Journal of the American Medical Association, 2004, v. 291, n. 1, p. 44, doi. 10.1001/jama.291.1.44-b

By:

Austin, Peter C.;
Mamdani, Muhammad M.;
Tu, Karen;
Zwarenstein, Merrick

Publication type:

Article

Influence of Using Different Databases and ‘Look Back’ Intervals to Define Comorbidity Profiles for Patients with Newly Diagnosed Hypertension: Implications for Health Services Researchers.

Published in:

PLoS ONE, 2016, v. 11, n. 9, p. 1, doi. 10.1371/journal.pone.0162074

By:

Chen, Guanmin;
Lix, Lisa;
Tu, Karen;
Hemmelgarn, Brenda R.;
Campbell, Norm R. C.;
McAlister, Finlay A.;
Quan, Hude;
null, null

Publication type:

Article

Allocation techniques for balance at baseline in cluster randomized trials: a methodological review.

Published in:

Trials, 2012, v. 13, n. 1, p. 120, doi. 10.1186/1745-6215-13-120

By:

Ivers, Noah M;
Halperin, Ilana J;
Barnsley, Jan;
Grimshaw, Jeremy M;
Shah, Baiju R;
Tu, Karen;
Upshur, Ross;
Zwarenstein, Merrick

Publication type:

Article

Maternal Schizophrenia and the Risk of a Childhood Chronic Condition.

Published in:

Schizophrenia Bulletin, 2022, v. 48, n. 6, p. 1252, doi. 10.1093/schbul/sbac091

By:

Vigod, Simone N;
Ray, Joel G;
Cohen, Eyal;
Wilton, Andrew S;
Saunders, Natasha R;
Barker, Lucy C;
Berard, Anick;
Dennis, Cindy-Lee;
Holloway, Alison C;
Morrison, Katherine;
Oberlander, Tim F;
Hanley, Gillian;
Tu, Karen;
Brown, Hilary K

Publication type:

Article

Antihypertensive Medication Prescribing in 27,822 Elderly Canadians With Diabetes Over the Past Decade.

Published in:

Diabetes Care, 2006, v. 29, n. 4, p. 836, doi. 10.2337/diacare.29.04.06.dc05-1875

By:

McAlister, Finlay A.;
Campbell, Norman R. C.;
Duong-Hua, Minh;
Chen, Zhongliang;
Tu, Karen

Publication type:

Article

Antihypertensive Therapy and Incidence of Type 2 Diabetesin an Elderly Cohort.

Published in:

Diabetes Care, 2004, v. 27, n. 10, p. 2458, doi. 10.2337/diacare.27.10.2458

By:

Padwal, Raj;
Mamdani, Muhammad;
Alter, David A.;
Hux, Jane E.;
Rottwell, Deanna M.;
Tu, Karen;
Laupacis, Andreas

Publication type:

Article

Reliability of routinely collected anthropometric measurements in primary care.

Published in:

2019

By:

Carsley, Sarah;
Parkin, Patricia C.;
Tu, Karen;
Pullenayegum, Eleanor;
Persaud, Nav;
Maguire, Jonathon L.;
Birken, Catherine S.;
TARGet Kids! Collaboration

Publication type:

journal article

Validity of algorithms for identifying five chronic conditions in MedicineInsight, an Australian national general practice database.

Published in:

2021

By:

Havard, Alys;
Manski-Nankervis, Jo-Anne;
Thistlethwaite, Jill;
Daniels, Benjamin;
Myton, Rimma;
Tu, Karen;
Chidwick, Kendal

Publication type:

journal article

Prevalence and Incidence Trends of Attention Deficit/Hyperactivity Disorder in Children and Youth Aged 1–24 Years in Ontario, Canada: A Validation Study of Health Administrative Data Algorithms: Tendances de la prévalence et de l'incidence du trouble de déficit de l'attention/hyperactivité chez les enfants et les jeunes âgés de 1 à 24 ans, en Ontario, Canada: une étude de validation des algorithmes de données administratives de santé

Published in:

Canadian Journal of Psychiatry, 2024, v. 69, n. 5, p. 326, doi. 10.1177/07067437231213553

By:

Butt, Debra A.;
Jaakkimainen, Liisa;
Tu, Karen

Publication type:

Article

Disruptions in Primary Care among People with Schizophrenia in Ontario, Canada, During the COVID-19 Pandemic.

Published in:

Canadian Journal of Psychiatry, 2023, v. 68, n. 6, p. 426, doi. 10.1177/07067437221140384

By:

Stephenson, Ellen;
Yusuf, Abban;
Gronsbell, Jessica;
Tu, Karen;
Melamed, Osnat;
Mitiku, Tezeta;
Selby, Peter;
O'Neill, Braden

Publication type:

Article

ADHD Treatment in Primary Care: Demographic Factors, Medication Trends, and Treatment Predictors.

Published in:

2017

By:

Hauck, Tanya S.;
Lau, Cindy;
Li Foa Wing, Laura;
Kurdyak, Paul;
Tu, Karen;
Wing, Laura Li Foa

Publication type:

journal article

Identifying Patterns of Primary Care Antibiotic Prescribing for a Spinal Cord Injury (SCI) Cohort Using an Electronic Medical Records (EMR) Database.

Published in:

Topics in Spinal Cord Injury Rehabilitation, 2023, v. 29, p. 153, doi. 10.46292/sci23-00047S

By:

Senthinathan, Arrani;
Penner, Melanie;
Tu, Karen;
Morris, Andrew M.;
Craven, B. Catharine;
Li, Zhiyin;
Guan, Jun;
Jaglal, Susan B.

Publication type:

Article

Trends in ADHD visits and prescriptions before and during the COVID-19 pandemic.

Published in:

Annals of Family Medicine, 2023, v. 21, p. 1

By:

Tu, Karen;
Butt, Debra;
Kalia, Sumeet;
Moineddin, Rahim;
Stephenson, Ellen

Publication type:

Article

Assessment of an Algorithm for Prescription of Oral Anticoagulation for Patients With Atrial Fibrillation in Emergency Departments.

Published in:

JAMA Network Open, 2020, v. 3, n. 3, p. e200306, doi. 10.1001/jamanetworkopen.2020.0306

By:

Atzema, Clare L.;
Fang, Jiming;
Cox, Jafna L.;
Chong, Alice S.;
Tu, Karen;
Austin, Peter C.

Publication type:

Article

The Epidemiology of Rheumatoid Arthritis in Ontario, Canada.

Published in:

Arthritis & Rheumatology, 2014, v. 66, n. 4, p. 786, doi. 10.1002/art.38306

By:

Widdifield, Jessica;
Paterson, J. Michael;
Bernatsky, Sasha;
Tu, Karen;
Tomlinson, George;
Kuriya, Bindee;
Thorne, J. Carter;
Bombardier, Claire

Publication type:

Article

Risk of Mortality in Immigrants with Multiple Sclerosis in Ontario, Canada.

Published in:

Neuroepidemiology, 2020, v. 54, n. 2, p. 148, doi. 10.1159/000506161

By:

Rotstein, Dalia;
Maxwell, Colleen;
Tu, Karen;
Schultz, Susan E.;
Fung, Kinwah;
Marrie, Ruth Ann

Publication type:

Article

Canadian Administrative Health Data Can Identify Patients with Myasthenia Gravis.

Published in:

Neuroepidemiology, 2015, v. 44, n. 2, p. 108, doi. 10.1159/000375463

By:

Breiner, ari;
Young, Jacqueline;
Green, Diane;
Katzberg, Hans D.;
Barnett, Carolina;
Bril, Vera;
Tu, Karen

Publication type:

Article