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. Hattangadi, N, Kay, T, Parkin, PC, Birken, CS, Maguire, JL, Szatmari, P et al.. Screening Accuracy of the Parent-Report Preschool Strengths and Difficulties Questionnaire in Primary Care. Acad Pediatr. 2023; :. doi: 10.1016/j.acap.2023.10.007. PubMed PMID:37907129 .
  2. Persaud, N, Azarpazhooh, A, Keown-Stoneman, C, Birken, CS, Isaranuwatchai, W, Maguire, JL et al.. Xylitol for the prevention of acute otitis media episodes in children aged 1-5 years: a randomised controlled trial. Arch Dis Child. 2023; :. doi: 10.1136/archdischild-2023-325565. PubMed PMID:37890960 .
  3. D'Hollander, CJ, Keown-Stoneman, CDG, Birken, CS, O'Connor, DL, Maguire, JL, TARGet Kids! collaboration et al.. Timing of introduction to solid food, eczema and wheezing in later childhood: a longitudinal cohort study. BMC Pediatr. 2023;23 (1):514. doi: 10.1186/s12887-023-04262-0. PubMed PMID:37845652 PubMed Central PMC10577938.
  4. Massara, P, Asrar, A, Bourdon, C, Ngari, M, Keown-Stoneman, CDG, Maguire, JL et al.. New approaches and technical considerations in detecting outlier measurements and trajectories in longitudinal children growth data. BMC Med Res Methodol. 2023;23 (1):232. doi: 10.1186/s12874-023-02045-w. PubMed PMID:37833647 PubMed Central PMC10576311.
  5. Nurse, KM, Parkin, PC, Keown-Stoneman, CDG, Bayoumi, I, Birken, CS, Maguire, JL et al.. Association Between Family Income and Positive Developmental Screening Using the Infant Toddler Checklist at the 18-Month Health Supervision Visit. J Pediatr. 2023;264 :113769. doi: 10.1016/j.jpeds.2023.113769. PubMed PMID:37821023 .
  6. Li, X, Keown-Stoneman, CDG, Anderson, LN, Allan, K, Fallon, BA, Parsons, JA et al.. Factors associated with COVID-19 vaccination in young children. Can J Public Health. 2023; :. doi: 10.17269/s41997-023-00817-x. PubMed PMID:37796366 .
  7. Palumbo, AM, Kirkwood, D, Borkhoff, CM, Keown-Stoneman, CDG, Muraca, GM, Fuller, A et al.. Validation of Parent-reported Gestational Age Categories for Children Less Than 6 Years of Age. Epidemiology. 2023;34 (6):767-773. doi: 10.1097/EDE.0000000000001645. PubMed PMID:37757868 .
  8. Yoshida-Montezuma, Y, Kirkwood, D, Sivapathasundaram, B, Keown-Stoneman, CDG, de Souza, RJ, To, T et al.. Late preterm birth and growth trajectories during childhood: a linked retrospective cohort study. BMC Pediatr. 2023;23 (1):450. doi: 10.1186/s12887-023-04257-x. PubMed PMID:37684561 PubMed Central PMC10485950.
  9. Borkhoff, SA, Parkin, PC, Birken, CS, Maguire, JL, Macarthur, C, Borkhoff, CM et al.. Examining the Double Burden of Underweight, Overweight/Obesity and Iron Deficiency among Young Children in a Canadian Primary Care Setting. Nutrients. 2023;15 (16):. doi: 10.3390/nu15163635. PubMed PMID:37630825 PubMed Central PMC10458882.
  10. Luscher, B, Maguire, JL, Rudolph, U, Sibille, E. GABAA receptors as targets for treating affective and cognitive symptoms of depression. Trends Pharmacol Sci. 2023;44 (9):586-600. doi: 10.1016/ PubMed PMID:37543478 PubMed Central PMC10511219.
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Affiliations & Other Activities

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