Jonathon Maguire




Dr. Jonathon Maguire is a Scientist in the Li Ka Shing Knowledge Institute of St. Michael’s Hospital and a Staff Pediatrician in the Department of Pediatrics at St. Michael’s Hospital with an active pediatric clinical practice. He is an Associate Professor of Pediatrics and Lawson Chair in Patient Engagement in Child Nutrition at the University of Toronto. His research interests focus on clinical trials involving nutrition and development in young children, as well as the creation of tools to facilitate evidence informed child health practice. He co-leads TARGet Kids!, the largest primary care research network for children in Canada. He has received a number of peer reviewed operating grants including a Canadian Institutes of Health Research Foundation Grant and a CIHR/SPOR Innovative Clinical Trials Mentorship Chair.

Recent Publications

  1. Eaton, A, Dyson, MP, Gokiert, R, Rajani, H, O'Neill, M, Ladha, T et al.. Priority topics for child and family health research in community-based paediatric health care according to caregivers and health care professionals. Paediatr Child Health. 2023;28 (3):158-165. doi: 10.1093/pch/pxac106. PubMed PMID:37205136 PubMed Central PMC10186094.
  2. Soczynska, I, da Costa, BR, O'Connor, DL, Jenkins, DJA, Birken, CS, Juando-Prats, C et al.. Parent and physician beliefs, perceptions and knowledge of plant milks for children. Nutr Health. 2023; :2601060231171299. doi: 10.1177/02601060231171299. PubMed PMID:37157791 .
  3. D'Hollander, CJ, McCredie, VA, Uleryk, EM, Keown-Stoneman, CDG, Birken, CS, O'Connor, DL et al.. Breastfeeding support provided by lactation consultants in high-income countries for improved breastfeeding rates, self-efficacy, and infant growth: a systematic review and meta-analysis protocol. Syst Rev. 2023;12 (1):75. doi: 10.1186/s13643-023-02239-9. PubMed PMID:37131212 PubMed Central PMC10152596.
  4. Kucab, MD, Keown-Stoneman, CDG, Birken, CS, Perlman, M, Maguire, JL, TARGet Kids! Collaboration et al.. Centre-based childcare in early childhood and growth in later childhood: a prospective cohort study. Int J Obes (Lond). 2023; :. doi: 10.1038/s41366-023-01316-2. PubMed PMID:37106078 .
  5. Li, X, Keown-Stoneman, CDG, Borkhoff, CM, Wong, PD, Arafeh, D, Tavares, E et al.. Factors associated with research participation in a large primary care practice-based pediatric cohort: Results from the TARGet Kids! longitudinal cohort study. PLoS One. 2023;18 (4):e0284192. doi: 10.1371/journal.pone.0284192. PubMed PMID:37040376 PubMed Central PMC10089319.
  6. Cost, KT, Unternaehrer, E, Tsujimoto, K, Vanderloo, LL, Birken, CS, Maguire, JL et al.. Patterns of parent screen use, child screen time, and child socio-emotional problems at 5 years. J Neuroendocrinol. 2023; :e13246. doi: 10.1111/jne.13246. PubMed PMID:36942788 .
  7. Patel, P, Li, X, Keown-Stoneman, CDG, Vanderloo, LM, Kinlin, LM, Maguire, JL et al.. Changes in Pediatric Movement Behaviors During the COVID-19 Pandemic by Stages of Lockdown in Ontario, Canada: A Longitudinal Cohort Study. J Phys Act Health. 2023;20 (4):292-302. doi: 10.1123/jpah.2022-0393. PubMed PMID:36848902 .
  8. Wigle, J, Hodwitz, K, Juando-Prats, C, Allan, K, Li, X, Howard, L et al.. Parents' perspectives on SARS-CoV-2 vaccinations for children: a qualitative analysis. CMAJ. 2023;195 (7):E259-E266. doi: 10.1503/cmaj.221401. PubMed PMID:36810223 PubMed Central PMC9943572.
  9. Deveci, AC, Keown-Stoneman, CDG, Maguire, JL, O'Connor, DL, Anderson, LN, Dennis, CL et al.. Paternal BMI in the preconception period, and the association with child zBMI. Int J Obes (Lond). 2023;47 (4):280-287. doi: 10.1038/s41366-023-01261-0. PubMed PMID:36737513 .
  10. Deveci, AC, Keown-Stoneman, CDG, Maguire, JL, O'Connor, DL, Anderson, LN, Dennis, CL et al.. Maternal BMI in the preconception period, and association with child zBMI growth rates. Pediatr Obes. 2023;18 (4):e12999. doi: 10.1111/ijpo.12999. PubMed PMID:36573480 .
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Affiliations & Other Activities

  • Staff Pediatrician, Department of Pediatrics, St. Michael’s Hospital
  • Associate Professor, Department of Pediatrics, University of Toronto