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Joel Ray

MD MSc FRCPC

Scientist, Li Ka Shing Knowledge Institute

Tel: 416 864-6060
Email: Joel.Ray@unityhealth.to

Research Programs

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. Velez, MP, Ray, JG. Assisted Reproduction and Offspring Neurodevelopment-Untangling Confounding by Indication. Paediatr Perinat Epidemiol. 2025; :. doi: 10.1111/ppe.70087. PubMed PMID:41305899 .
  2. Yau, K, Ray, JG, Jeyakumar, N, Luo, B, Abdullah, S, Dixon, SN et al.. Glucagon-like Peptide-1 Receptor Agonists and Risk of Major Adverse Cardiovascular Events in Patients With CKD. Am J Kidney Dis. 2025; :. doi: 10.1053/j.ajkd.2025.09.010. PubMed PMID:41238166 .
  3. Velez, MP, Treacy, K, Shellenberger, J, Ray, JG. SARS-CoV-2 Vaccination and Disorders of Menstruation: A Population-Based Cohort Study. J Obstet Gynaecol Can. 2025;47 (12):103159. doi: 10.1016/j.jogc.2025.103159. PubMed PMID:41138850 .
  4. Brown, HK, Varner, CE, Lunsky, Y, Santiago-Jimenez, M, Fung, K, Cohen, E et al.. Concurrent Emergency Department Use by a New Mother With a Disability and Her Newborn. Pediatrics. 2025;156 (4):. doi: 10.1542/peds.2025-071883. PubMed PMID:40957631 .
  5. Venegas, CL, Abdulaziz, KE, Ray, JG, Walker, M, Brownlee, J, Sprague, AE et al.. Fatal Obstetrical Hemorrhage: A 20-Year Analysis From Ontario. J Obstet Gynaecol Can. 2025;47 (11):103112. doi: 10.1016/j.jogc.2025.103112. PubMed PMID:40947012 .
  6. Simard, C, Fu, L, Odugbemi, T, Simpson, AN, Guan, J, Tagalakis, V et al.. Exposure to Computed Tomography Before Pregnancy and Risk for Pregnancy Loss and Congenital Anomalies : A Population-Based Cohort Study. Ann Intern Med. 2025;178 (11):1539-1548. doi: 10.7326/ANNALS-24-03479. PubMed PMID:40921077 .
  7. Brown, HK, Fung, K, Cohen, E, Dennis, CL, Grandi, SM, Rosella, LC et al.. Multiple Chronic Conditions Before Pregnancy and Risk of Adverse Maternal Health Outcomes: Population-Based Cohort Study. BJOG. 2026;133 (1):142-153. doi: 10.1111/1471-0528.18347. PubMed PMID:40903810 .
  8. Ray, JG, Podolsky, S, Sorbara, C, Stukel, TA. Infant Emergency Department Use After Midwifery- Versus Obstetrician-Led Perinatal Care: A Population-Based Cohort Study. BJOG. 2026;133 (1):132-141. doi: 10.1111/1471-0528.18346. PubMed PMID:40859785 .
  9. Velez, MP, Dayan, N, Vigod, SN, Buckett, W, Flatt, S, Shellenberger, J et al.. New-Onset Mental Illness Among Gestational Carriers. JAMA Netw Open. 2025;8 (7):e2523428. doi: 10.1001/jamanetworkopen.2025.23428. PubMed PMID:40711788 .
  10. Ray, JG, Berger, H, Aoyama, K, Cook, JL, Aflaki, K, Park, AL et al.. Does infant birthweight percentile identify mothers at risk of severe morbidity? A Canadian population-based cohort study. Matern Health Neonatol Perinatol. 2025;11 (1):19. doi: 10.1186/s40748-025-00217-8. PubMed PMID:40604901 PubMed Central PMC12225049.
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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