Joel Ray

MD MSc FRCPC

Scientist, Li Ka Shing Knowledge Institute

Biography

Clinician-Scientist with a focus on premature mortality, pregnancy, fetal medicine, neonatology and thrombosis. An epidemiologist with experience in large-scale observational studies.

Recent Publications

  1. Ray, JG, Butler, EA, Grandi, SM, Cohen, E. Maternal-Newborn ABO Blood Group Congruence Among Consecutive Births and Risk of Serious Neonatal Infection: Retrospective Cohort Study. Pediatr Infect Dis J. 2025; :. doi: 10.1097/INF.0000000000004728. PubMed PMID:39854201 .
  2. Jairam, JA, Cohen, E, Diong, C, Brown, HK, Guan, J, Berger, H et al.. Joint Effects of Maternal Comorbidity and Neighbourhood Income Mobility on the Ensuing Risk of Severe Maternal Morbidity. BJOG. 2025; :. doi: 10.1111/1471-0528.18078. PubMed PMID:39834027 .
  3. Brown, HK, Gomes, T, Wilton, AS, Camden, A, Guttmann, A, Dennis, CL et al.. Maternal Chronic Physical Conditions and Alcohol and Substance Use Disorders in the Preconception and Perinatal Periods. J Womens Health (Larchmt). 2025; :. doi: 10.1089/jwh.2024.0757. PubMed PMID:39791195 .
  4. Scime, NV, Velez, MP, Choi, MY, Ray, JG, Boblitz, A, Brown, HK et al.. Association between infertility and incident onset of systemic autoimmune rheumatic disease after childbirth: a population-based cohort study. Hum Reprod. 2025;40 (1):157-166. doi: 10.1093/humrep/deae253. PubMed PMID:39656875 PubMed Central PMC11700898.
  5. Harel, Z, Jeyakumar, N, Smith, G, Ray, JG, Clemens, KK, Juurlink, DN et al.. Rhabdomyolysis and Sodium-Glucose-Linked Transport Inhibitors in Patients Taking Statins. JAMA Netw Open. 2024;7 (11):e2446641. doi: 10.1001/jamanetworkopen.2024.46641. PubMed PMID:39541123 PubMed Central PMC11565259.
  6. Butler, EA, Ray, JG, Cohen, E. Maternal-Newborn ABO Blood Groups and Risk of Bacterial Infection in Newborns. JAMA Netw Open. 2024;7 (10):e2442227. doi: 10.1001/jamanetworkopen.2024.42227. PubMed PMID:39476233 PubMed Central PMC11525604.
  7. Metcalfe, A, Cairncross, ZF, McMorris, CA, Friedenreich, CM, Nelson, G, Bhatti, P et al.. Cancer chemotherapy in pregnancy and adverse pediatric outcomes: a population-based cohort study. J Natl Cancer Inst. 2024; :. doi: 10.1093/jnci/djae273. PubMed PMID:39475425 .
  8. Jairam, JA, Cohen, E, Diong, C, Berger, H, Guan, J, Butler, EA et al.. Maternal Downward Neighborhood Income Mobility and Newborn Discharge to Child Protective Services. JAMA Netw Open. 2024;7 (10):e2440604. doi: 10.1001/jamanetworkopen.2024.40604. PubMed PMID:39441599 PubMed Central PMC11581567.
  9. Velez, MP, Ivanova, M, Shellenberger, J, Pudwell, J, Ray, JG. Severe Maternal and Neonatal Morbidity Among Gestational Carriers : A Cohort Study. Ann Intern Med. 2024;177 (11):1482-1488. doi: 10.7326/M24-0417. PubMed PMID:39312777 .
  10. Aoyama, K, Yang, A, Pinto, R, Ray, JG, Hill, A, Scales, DC et al.. Using multi-level regression to determine associations and estimate causes and effects in clinical anesthesia due to patient, practitioner and hospital or health system practice variability. J Anesth. 2025;39 (1):134-145. doi: 10.1007/s00540-024-03408-3. PubMed PMID:39292247 PubMed Central PMC11782401.
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Affiliations & Other Activities

  • Scientist, Institute for Clinical Evaluative Sciences (ICES)
  • Sick Kids Research Institute
  • Professor, Institute of Health Policy, Management and Evaluation, University of Toronto
  • Professor, Department of Medicine, University of Toronto