Jonathon Maguire


Scientist, Li Ka Shing Knowledge Institute


Dr. Jonathon Maguire is an assistant professor of Pediatrics at the University of Toronto, 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 hospitalist and outpatient clinical practice. 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 2015 CIHR Foundation Grant as well as a several awards including the Samuel J. Fomon Young Physician Award from the American Society of Nutrition, the Canadian Paediatric Society Young Investigator Award, a Canadian Institutes of Health Research New Investigator Award and an Ontario Ministry of Research and Innovation Early Researcher Award.

Recent Publications

  1. Cox, KA, Parkin, PC, Anderson, LN, Chen, Y, Birken, CS, Maguire, JL et al.. The association between meat and meat alternatives consumption and iron stores in early childhood. Acad Pediatr. 2016; :. doi: 10.1016/j.acap.2016.01.003. PubMed PMID:26804490 .
  2. Pai, N, Kandasamy, S, Uleryk, E, Maguire, JL. Social Risk Screening for Pediatric Inpatients. Clin Pediatr (Phila). 2015; :. doi: 10.1177/0009922815623498. PubMed PMID:26712932 .
  3. Brett, NR, Lavery, P, Agellon, S, Vanstone, CA, Maguire, JL, Rauch, F et al.. Dietary vitamin D dose-response in healthy children 2 to 8 y of age: a 12-wk randomized controlled trial using fortified foods. Am. J. Clin. Nutr. 2016;103 (1):144-52. doi: 10.3945/ajcn.115.115956. PubMed PMID:26675772 .
  4. Anderson, LN, Lebovic, G, Hamilton, J, Hanley, AJ, McCrindle, BW, Maguire, JL et al.. Body Mass Index, Waist Circumference, and the Clustering of Cardiometabolic Risk Factors in Early Childhood. Paediatr Perinat Epidemiol. 2015; :. doi: 10.1111/ppe.12268. PubMed PMID:26645704 .
  5. Sarker, H, Anderson, LN, Borkhoff, CM, Abreo, K, Tremblay, MS, Lebovic, G et al.. Validation of parent-reported physical activity and sedentary time by accelerometry in young children. BMC Res Notes. 2015;8 (1):735. doi: 10.1186/s13104-015-1648-0. PubMed PMID:26621253 PubMed Central PMC4666154.
  6. Borkhoff, CM, Heale, LD, Anderson, LN, Tremblay, MS, Maguire, JL, Parkin, PC et al.. Objectively measured physical activity of young Canadian children using accelerometry. Appl Physiol Nutr Metab. 2015;40 (12):1302-8. doi: 10.1139/apnm-2015-0164. PubMed PMID:26573442 .
  7. De Souza, LR, Berger, H, Retnakaran, R, Maguire, JL, Nathens, AB, Connelly, PW et al.. First-Trimester Maternal Abdominal Adiposity Predicts Dysglycemia and Gestational Diabetes Mellitus in Midpregnancy. Diabetes Care. 2016;39 (1):61-4. doi: 10.2337/dc15-2027. PubMed PMID:26525976 .
  8. Abdullah, K, Thorpe, KE, Maguire, JL, Birken, CS, Fehlings, D, Hanley, AJ et al.. Risk factors, practice variation and hematological outcomes of children identified with non-anemic iron deficiency following screening in primary care setting. Paediatr Child Health. ;20 (6):302-6. . PubMed PMID:26435669 PubMed Central PMC4578469.
  9. Riverin, BD, Maguire, JL, Li, P. Vitamin D Supplementation for Childhood Asthma: A Systematic Review and Meta-Analysis. PLoS ONE. 2015;10 (8):e0136841. Epub 2015/8/31. doi: 10.1371/journal.pone.0136841. PubMed PMID:26322509 PubMed Central PMC4556456.
  10. Birken, CS, Lichtblau, B, Lenton-Brym, T, Tucker, P, Maguire, JL, Parkin, PC et al.. Parents' perception of stroller use in young children: a qualitative study. BMC Public Health. 2015;15 (1):808. doi: 10.1186/s12889-015-1989-6. PubMed PMID:26289426 PubMed Central PMC4546049.
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Affiliations & Other Activities

  • Staff Pediatrician, Department of Pediatrics, St. Michael’s Hospital
  • Assistant professor of Pediatrics, University of Toronto