Catherine Ji



Toronto Western Hospital
440 Bathurst Street, 3rd Floor, Toronto, Ontario Canada M5T 2S6
Research Interests
Chronic Diseases, Vaccines, Public Health, Health Service Delivery, Global Health, Electronic Medical Records, Disadvantaged Populations, Observational Studies, Survey Methods, Mixed Methods
Not Accepting Students

Recent Publications

Ji C, Piché-Renaud PP, Apajee J, Stephenson E, Forte M, Friedman JN, Science M, Zlotkin S, Morris SK, Tu K. Vaccine. Impact of the COVID-19 pandemic on routine immunization coverage in children under 2 years old in Ontario, Canada: A retrospective cohort study. 2022 Feb 8:S0264-410X(22)00131-1.

Stephenson E, O'Neill B, Kalia S, Ji C, Crampton N, Butt DA, Tu K. Effects of COVID-19 pandemic on anxiety and depression in primary care: A retrospective cohort study. J Affect Disord. 2022 Feb 6;303:216-222. 

Stephenson E, Butt DA, Gronsbell J, Ji C, O'Neill B, Crampton N, Tu K. Changes in the top 25 reasons for primary care visits during the COVID-19 pandemic in a high-COVID region of Canada. PLoS One. 2021 Aug 12;16(8):e0255992. 

Stephenson E, O'Neill B, Gronsbell J, Butt DA, Crampton N, Ji C, Kalia S, Meaney C, Tu K. Changes in family medicine visits across sociodemographic groups after the onset of the COVID-19 pandemic in Ontario: a retrospective cohort study. CMAJ Open. 2021 Jun 15;9(2):E651-E658. 

Piché-Renaud PP, Ji C, Farrar DS, Friedman JN, Science M, Kitai I, Burey S, Feldman M, Morris SK. Impact of the COVID-19 pandemic on the provision of routine childhood immunizations in Ontario, Canada. Vaccine. 2021 Jul 13;39(31):4373-4382. 

Delouya G, Taussky D, Ji CR, Sylvestre MP, Donath D. Relationship between prostate-specific antigen bounce body fat distribution and body mass index in permanent seed brachytherapy for prostate cancer. Brachytherapy. 2012 May-Jun;11(3):214-8. 


June 2021

1 year

NSERC 2021 Encouraging vaccine confidence in Canada grant competition

Project: Training peers in motivational interviewing to increase vaccine confidence among healthcare workers in a large, urban healthcare institution

Role: Principal Investigator

Amount: $49,417.60

November 2020

1 year

Pfizer Global Medical Grants Assessment of on-time immunization coverage in children under 2 years of age in Canada (Competitive Grant Program)

Project: Impact of the COVID-19 Pandemic on Early Childhood Immunization Coverage in Ontario, Canada

Role: Principal Investigator

Team: Ji C (PI), Morris SK (Co-PI), Piché-Renaud P-P, Burey S, Friedman J, Science M, Zlotkin S

Amount: $99,594.65

September 2020

2 years

College of Family Physicians of Canada Janus Research Grant

Project: Prescription Trends of Thiazide Diuretics in a Canadian Primary Care Population

Role: Principal Investigator

Team: Ji C (PI), Tu K

Amount: $7,500

September 2020

2 years

CIHR Operating Grant: COVID-19 Mental Health and Substance Use Service Needs and Delivery

Project: Evaluating the impact of COVID-19 pandemic on primary care using real world data: focus mental health. 

Role: Co-Investigator

Team: Tu K (PI), Selby P (Co-PI), Butt D, Crampton N, Ji C, Melamed O, Mitiku T, Moineddin R, Mulsant B, O’Neill B, Rouleau K, Rudzicz F, Sodhi S

Amount: $200,000

June 2020

1 year

Creative Professional Activity Grant, Dept. of Pediatrics, Hospital for Sick Children

Project: Questionnaire Based Assessment of Pediatrics and Family Physicians Routine Childhood Immunization Practices during the COVID‐19 Pandemic

Role: Co-Investigator

Team: Morris SK (PI), Piché-Renaud P-P, Friedman J, Feldman M, Kitai I, Science M, Ji C

Amount: $5,000