Table of Contents

Research

• Open Access

  SARS-CoV-2 antibodies in Ontario health care workers during and after the first wave of the pandemic: a cohort study

  Michelle Science, Shelly Bolotin, Michael Silverman, Jeya Nadarajah, Bryan Maguire, Rulan S. Parekh, Allison McGeer, Kevin L. Schwartz, Laura Alexander, Upton Allen, Archchun Ariyarajah, Lucas Castellani, Ronald D. Cohn, Mark Downing, Kevin Katz, Kescha Kazmi, Jerome A. Leis, Derek Liu, Jeffrey M. Pernica, Jane E. Schneiderman, Maya Sumaida and Aaron Campigotto

  October 12, 2021 9 (4) E929-E939; DOI: https://doi.org/10.9778/cmajo.20210044
• Open Access

  Risks associated with colonoscopy in a population-based colon screening program: an observational cohort study

  Marcel Tomaszewski, David Sanders, Robert Enns, Laura Gentile, Scott Cowie, Carla Nash, Denis Petrunia, Paul Mullins, Jeremy Hamm, Nazanin Azari-Razm, Dmitriy Bykov and Jennifer Telford

  October 12, 2021 9 (4) E940-E947; DOI: https://doi.org/10.9778/cmajo.20200192
• Open Access

  Health care costs of hospitalization of young children for respiratory syncytial virus infections: a population-based matched cohort study

  Nisha Thampi, Braden D. Knight, Kednapa Thavorn, Richard J. Webster, Krista Lanctot, Steven Hawken and J. Dayre McNally

  October 19, 2021 9 (4) E948-E956; DOI: https://doi.org/10.9778/cmajo.20200219
• Open Access

  Changes in the reach of a smoking cessation program in Ontario, Canada, during the COVID-19 pandemic: a cross-sectional study

  Nadia Minian, Scott Veldhuizen, Elise Tanzini, Stephanie Duench, Wayne K. deRuiter, Megan Barker, Laurie Zawertailo, Osnat C. Melamed and Peter Selby

  October 19, 2021 9 (4) E957-E965; DOI: https://doi.org/10.9778/cmajo.20210053
• Open Access

  Impacts of the Certificates of Added Competence credentialling program: a qualitative case study of enhanced-skill family medicine practice across Canada

  Lawrence Grierson, Ilana Allice, Alison Baker, Alexandra Farag, Jesse Guscott, Michelle Howard, Margo Mountjoy, Henry Y.-H. Siu, X. Catherine Tong and Meredith Vanstone

  November 09, 2021 9 (4) E966-E972; DOI: https://doi.org/10.9778/cmajo.20200278
• Open Access

  Incidence and prevalence of primary malignant brain tumours in Canada from 1992 to 2017: an epidemiologic study

  Mathew R. Voisin, Sanskriti Sasikumar, Alireza Mansouri and Gelareh Zadeh

  November 09, 2021 9 (4) E973-E979; DOI: https://doi.org/10.9778/cmajo.20200295
• Open Access

  Data-sharing practices in publications funded by the Canadian Institutes of Health Research: a descriptive analysis

  Kevin B. Read, Heather Ganshorn, Sarah Rutley and David R. Scott

  November 09, 2021 9 (4) E980-E987; DOI: https://doi.org/10.9778/cmajo.20200303
• Open Access

  Acute mental health service use following onset of the COVID-19 pandemic in Ontario, Canada: a trend analysis

  Natasha R. Saunders, Alene Toulany, Bhumika Deb, Rachel Strauss, Simone N. Vigod, Astrid Guttmann, Maria Chiu, Anjie Huang, Kinwah Fung, Simon Chen and Paul Kurdyak

  November 16, 2021 9 (4) E988-E997; DOI: https://doi.org/10.9778/cmajo.20210100
• Open Access

  Discrimination experienced by Asian Canadian and Asian American health care workers during the COVID-19 pandemic: a qualitative study

  Zhida Shang, Jennifer Y. Kim and Shuliang O. Cheng

  November 16, 2021 9 (4) E998-E1004; DOI: https://doi.org/10.9778/cmajo.20210090
• Open Access

  Estimating the population health burden of Lyme disease in Ontario, Canada: a microsimulation modelling approach

  Stephen Mac, Gerald A. Evans, Samir N. Patel, Eleanor M. Pullenayegum and Beate Sander

  November 16, 2021 9 (4) E1005-E1012; DOI: https://doi.org/10.9778/cmajo.20210024
• Open Access

  The mental well-being and coping strategies of Canadian adolescents during the COVID-19 pandemic: a qualitative, cross-sectional study

  Kendra Nelson Ferguson, Stephanie E. Coen, Danielle Tobin, Gina Martin, Jamie A. Seabrook and Jason A. Gilliland

  November 16, 2021 9 (4) E1013-E1020; DOI: https://doi.org/10.9778/cmajo.20210042
• Open Access

  Analyzing supply and demand on a general internal medicine ward: a cross-sectional study

  Michael Fralick, Neal Kaw, Mingkun Wang, Muhammad Mamdani and Ophyr Mourad

  November 16, 2021 9 (4) E1021-E1025; DOI: https://doi.org/10.9778/cmajo.20200252
• Open Access

  Structures, processes and models of care for emergency general surgery in Ontario: a cross-sectional survey

  Graham Skelhorne-Gross, Rahima Nenshi, Angela Jerath and David Gomez

  November 23, 2021 9 (4) E1026-E1033; DOI: https://doi.org/10.9778/cmajo.20200306
• Open Access

  Developing a patient-oriented realist evaluation for COVID-19 vaccine implementation in Saskatchewan: a methodologic framework

  Amir Reza Azizian, Tracey Carr, Nazeem Muhajarine, Tanya Verrall, Collin Hartness, Jason Vanstone, Maryam Yasinian, Candace Skrapek, Brenda Andreas, Gerald Farthing and Gary Groot

  November 23, 2021 9 (4) E1034-E1039; DOI: https://doi.org/10.9778/cmajo.20210041
• Open Access

  The role of hospital characteristics in patient safety: a protocol for a national cohort study

  Khara M. Sauro, G. Ross Baker, George Tomlinson and Christopher Parshuram

  November 23, 2021 9 (4) E1041-E1047; DOI: https://doi.org/10.9778/cmajo.20200266
• Open Access

  Comparison of claims from high–drug cost beneficiaries in Ontario, Canada, and Australia: a cross-sectional analysis

  Mina Tadrous, Benjamin Daniels, Sallie-Anne Pearson and Tara Gomes

  November 23, 2021 9 (4) E1048-E1054; DOI: https://doi.org/10.9778/cmajo.20200291
• Open Access

  Projected impact of biosimilar substitution policies on drug use and costs in Ontario, Canada: a cross-sectional time series analysis

  Tara Gomes, Daniel McCormack, Sophie A. Kitchen, J. Michael Paterson, Muhammad M. Mamdani, Laurie Proulx, Lorraine Bayliss and Mina Tadrous

  November 23, 2021 9 (4) E1055-E1062; DOI: https://doi.org/10.9778/cmajo.20210091
• Open Access

  The ophthalmic surgical backlog associated with the COVID-19 pandemic: a population-based and microsimulation modelling study

  Tina Felfeli, Raphael Ximenes, David M.J. Naimark, Philip L. Hooper, Robert J. Campbell, Sherif R. El-Defrawy and Beate Sander

  November 23, 2021 9 (4) E1063-E1072; DOI: https://doi.org/10.9778/cmajo.20210145
• Open Access

  COVID-19 in a remote First Nations community in British Columbia, Canada: an outbreak report

  Courtney R. Smith, Charmaine Enns, Dan Cutfeet, Shannon Alfred, Nicole James, Jennifer Lindbeck and Shannon Russell

  November 30, 2021 9 (4) E1073-E1079; DOI: https://doi.org/10.9778/cmajo.20210054
• Open Access

  Primary care bonus payments and patient-reported access in urban Ontario: a cross-sectional study

  Kamila Premji, Ewa Sucha, Richard H. Glazier, Michael E. Green, Walter P. Wodchis, William E. Hogg, Tara Kiran, Eliot Frymire, Thomas R. Freeman and Bridget L. Ryan

  November 30, 2021 9 (4) E1080-E1096; DOI: https://doi.org/10.9778/cmajo.20200235
• Open Access

  Dispensing and practice use patterns, facilitators and barriers for uptake of ulipristal acetate emergency contraception in British Columbia: a mixed-methods study

  Michelle C. Chan, Sarah Munro, Laura Schummers, Arianne Albert, Frannie Mackenzie, Judith A. Soon, Parkash Ragsdale, Brian Fitzsimmons and Regina Renner

  November 30, 2021 9 (4) E1097-E1104; DOI: https://doi.org/10.9778/cmajo.20200193
• Open Access

  Effect of electronic medication reconciliation at the time of hospital discharge on inappropriate medication use in the community: an interrupted time-series analysis

  Blayne Welk, Lauren Killin, Jennifer N. Reid, Kelly K. Anderson, Salimah Z. Shariff, Andrew Appleton, Glen Kearns and Amit X. Garg

  November 30, 2021 9 (4) E1105-E1113; DOI: https://doi.org/10.9778/cmajo.20210071
• Open Access

  Brain structure and function in people recovering from COVID-19 after hospital discharge or self-isolation: a longitudinal observational study protocol

  Bradley J. MacIntosh, Xiang Ji, J. Jean Chen, Asaf Gilboa, Eugenie Roudaia, Allison B. Sekuler, Fuqiang Gao, Jordan A. Chad, Aravinthan Jegatheesan, Mario Masellis, Maged Goubran, Jennifer Rabin, Benjamin Lam, Ivy Cheng, Robert Fowler, Chris Heyn, Sandra E. Black and Simon J. Graham

  November 30, 2021 9 (4) E1114-E1119; DOI: https://doi.org/10.9778/cmajo.20210023
• Open Access

  Physician perspectives on delays in cancer diagnosis in Alberta: a qualitative study

  Anna Pujadas Botey, Kathy GermAnn, Paula J. Robson, Barbara M. O’Neill and Douglas A. Stewart

  November 30, 2021 9 (4) E1120-E1127; DOI: https://doi.org/10.9778/cmajo.20210013
• Open Access

  Extent of a valsartan drug shortage and its effect on antihypertensive drug use in the Canadian population: a national cross-sectional study

  Jennifer Fenna, Cherry Chu, Rola Hassan, Tara Gomes and Mina Tadrous

  December 07, 2021 9 (4) E1128-E1133; DOI: https://doi.org/10.9778/cmajo.20200232
• Open Access

  Association between new-onset anosmia and positive SARS-CoV-2 tests among people accessing outpatient testing in Toronto, Ontario: a retrospective cross-sectional study

  Braden O’Neill, Sumeet Kalia, Peter Gill, Susan Hum, Carla Moran-Venegas, Rebecca Stoller, Michelle Greiver, Payal Agarwal, Abirami Kirubarajan, Samuel DeKoven, David Eisen, Andrew Pinto and Sheila Dunn

  December 07, 2021 9 (4) E1134-E1140; DOI: https://doi.org/10.9778/cmajo.20210085
• Open Access

  Using the Edmonton Obesity Staging System in the real world: a feasibility study based on cross-sectional data

  Rukia Swaleh, Taylor McGuckin, Tyler W. Myroniuk, Donna Manca, Karen Lee, Arya M. Sharma, Denise Campbell-Scherer and Roseanne O. Yeung

  December 07, 2021 9 (4) E1141-E1148; DOI: https://doi.org/10.9778/cmajo.20200231
• Open Access

  Pediatric primary care in Ontario and Manitoba after the onset of the COVID-19 pandemic: a population-based study

  Natasha Saunders, Astrid Guttmann, Marni Brownell, Eyal Cohen, Longdi Fu, Jun Guan, Joykrishna Sarkar, Alyson Mahar, Sima Gandhi, Lisa Fiksenbaum, Alan Katz, Nkiruka Eze and Therese A. Stukel

  December 14, 2021 9 (4) E1149-E1158; DOI: https://doi.org/10.9778/cmajo.20210161
• Open Access

  Conceptualizing success factors for patient engagement in patient medical homes: a cross-sectional survey

  Nadiya Sunderji, Allyson Ion, Vincent Tang, Jennifer Rayner, Carol Mulder, Noah Ivers and Akram Alyass

  December 14, 2021 9 (4) E1159-E1167; DOI: https://doi.org/10.9778/cmajo.20200152
• Open Access

  Prevalence of and risk factors for excess weight gain in pregnancy: a cross-sectional study using survey data

  Jamie L. Benham, Jane E. Booth, Lois E. Donovan, Alexander A. Leung, Ronald J. Sigal and Doreen M. Rabi

  December 14, 2021 9 (4) E1168-E1174; DOI: https://doi.org/10.9778/cmajo.20200276
• Open Access

  Impact of COVID-19 on hospital hand hygiene performance: a multicentre observational study using group electronic monitoring

  Victoria Williams, Adam Kovacs-Litman, Matthew P. Muller, Susy Hota, Jeff E. Powis, Daniel R. Ricciuto, Dominik Mertz, Kevin Katz, Lucas Castellani, Alex Kiss, Amber Linkenheld-Struk and Jerome A. Leis

  December 14, 2021 9 (4) E1175-E1180; DOI: https://doi.org/10.9778/cmajo.20210072
• Open Access

  The impact of proposed regulatory changes and rescheduling on low-dose codeine purchasing in Canada: a time-series analysis

  Charlotte G. Boone, Tony Antoniou, David N. Juurlink, Teagan Rolf von den Baumen, Sophie A. Kitchen, Georgia C. Richards, Mina Tadrous and Tara Gomes

  December 14, 2021 9 (4) E1181-E1186; DOI: https://doi.org/10.9778/cmajo.20210173
• Open Access

  Impact of the Connected Medicine collaborative in improving access to specialist care: a cross-sectional analysis

  Clare Liddy, Emma Boulay, Lois Crowe, Maxine Dumas-Pilon, Neil Drimer, Gerard Farrell, Laurie Ireland, Christine (Kirby) Kirvan, Veronique Nabelsi, Alexander Singer, Margot Wilson and Erin Keely

  December 14, 2021 9 (4) E1187-E1194; DOI: https://doi.org/10.9778/cmajo.20200210
• Open Access

  The effect of interventions targeting gut microbiota on depressive symptoms: a systematic review and meta-analysis

  Mark Hofmeister, Fiona Clement, Scott Patten, Joyce Li, Laura E. Dowsett, Brenlea Farkas, Liza Mastikhina, Oluwaseun Egunsola, Ruth Diaz, Noah C.A. Cooke and Valerie H. Taylor

  December 21, 2021 9 (4) E1195-E1204; DOI: https://doi.org/10.9778/cmajo.20200283
• Open Access

  Adherence to guidance for prioritizing higher risk groups for breast cancer screening during the COVID-19 pandemic in the Ontario Breast Screening Program: a descriptive study

  Anna M. Chiarelli, Meghan J. Walker, Gabriela Espino-Hernandez, Natasha Gray, Ayesha Salleh, Chamila Adhihetty, Julia Gao, Samantha Fienberg, Michelle A. Rey and Linda Rabeneck

  December 21, 2021 9 (4) E1205-E1212; DOI: https://doi.org/10.9778/cmajo.20200285
• Open Access

  Health care access among transgender and nonbinary people in Canada, 2019: a cross-sectional survey

  Ayden I. Scheim, Todd Coleman, Nathan Lachowsky and Greta R. Bauer

  December 21, 2021 9 (4) E1213-E1222; DOI: https://doi.org/10.9778/cmajo.20210061
• Open Access

  Risk stratification for COVID-19 hospitalization: a multivariable model based on gradient-boosting decision trees

  Jahir M. Gutierrez, Maksims Volkovs, Tomi Poutanen, Tristan Watson and Laura C. Rosella

  December 21, 2021 9 (4) E1223-E1231; DOI: https://doi.org/10.9778/cmajo.20210036
• Open Access

  Infection control measures to prevent outbreaks of COVID-19 in Quebec hemodialysis units: a cross-sectional survey

  William Beaubien-Souligny, Annie-Claire Nadeau-Fredette, Marie-Noel Nguyen, Norka Rios, Marie-Line Caron, Alexander Tom and Rita S. Suri MD; for the Quebec Renal Network COVID-19 Study Investigators

  December 21, 2021 9 (4) E1232-E1241; DOI: https://doi.org/10.9778/cmajo.20210102
• Open Access

  The 2018 Global Point Prevalence Survey of antimicrobial consumption and resistance in 47 Canadian hospitals: a cross-sectional survey

  Greg J. German, Charles Frenette, Jean-Alexandre Caissy, Jennifer Grant, Marie-Astrid Lefebvre, Dominik Mertz, Sarah Lutes, Allison McGeer, Jacqueline Roberts, Kevin Afra, Louis Valiquette, Yannick Émond, Marie Carrier, Anaïs Lauzon-Laurin, Trong Tien Nguyen, Hamed Al-Bachari, Justin Kosar, Shaqil Peermohamed, Michelle Science, Daniel Landry, Timothy MacLaggan, Peter Daley, Gerald McDonald, Anita Ang, Sandra Chang, Yu-Chen Lin, Brandon Tong, Suzanne Malfair, Victor Leung, Kevin Katz, Ines Pauwels, Herman Goossens, Ann Versporten, John Conly and Daniel J.G. Thirion

  December 21, 2021 9 (4) E1242-E1251; DOI: https://doi.org/10.9778/cmajo.20200274
• Open Access

  Estimating the effect of timetabling decisions on the spread of SARS-CoV-2 in medium-to-large engineering schools in Canada: an agent-based modelling study

  Robert W. Brennan, Nancy Nelson and Robyn Paul

  December 21, 2021 9 (4) E1252-E1259; DOI: https://doi.org/10.9778/cmajo.20200280
• Open Access

  Hypoglycemia requiring paramedic assistance among adults in southwestern Ontario, Canada: a population-based retrospective cohort study

  Selina L. Liu, Melanie P. Columbus, Michael Peddle, Jeffrey L. Mahon and Tamara Spaic

  December 21, 2021 9 (4) E1260-E1268; DOI: https://doi.org/10.9778/cmajo.20200184