Henry Ahn




Dr. Henry Ahn is an orthopaedic surgeon and Associate Scientist in the Li Ka Shing Knowledge Institute at St. Michael’s Hospital.  He has a PhD in Clinical Epidemiology from the Institute of Health Policy, Management and Evaluation (IHPME) at the University of Toronto. His clinical practice is focused on the management of polytrauma patients with significant orthopaedic injuries, spinal cord injuries, along with complex adult spinal disorders. Dr. Ahn is a member of the University of Toronto Spine Program and is a Principal Investigator with the Rick Hansen Registry.  He has a research interest in the management of spinal cord injury and the epidemiology of spinal cord injury incorporating large databases, prospective cohort studies, along with randomized control trials.

Recent Publications

  1. Fehlings, MG, Pedro, KM, Alvi, MA, Badhiwala, JH, Ahn, H, Farhadi, HF et al.. Riluzole for Degenerative Cervical Myelopathy: A Secondary Analysis of the CSM-PROTECT Trial. JAMA Netw Open. 2024;7 (6):e2415643. doi: 10.1001/jamanetworkopen.2024.15643. PubMed PMID:38904964 PubMed Central PMC11193126.
  2. Bak, AB, Moghaddamjou, A, Alvi, M, Ahn, H, Farhadi, HF, Shaffrey, CI et al.. Postoperative C5 Palsy after Anterior or Posterior Decompression for Degenerative Cervical Myelopathy: A Subgroup Analysis of the Multicenter, Prospective, Randomized, Phase III, CSM-Protect Clinical Trial. Spine (Phila Pa 1976). 2024; :. doi: 10.1097/BRS.0000000000005007. PubMed PMID:38616732 .
  3. Nguyen, J, Wang, L, Lei, W, Hu, Y, Gulati, N, Chavez-Madero, C et al.. Culture substrate stiffness impacts human myoblast contractility-dependent proliferation and nuclear envelope wrinkling. J Cell Sci. 2024;137 (6):. doi: 10.1242/jcs.261666. PubMed PMID:38345101 PubMed Central PMC11033523.
  4. Abbas, A, Olotu, O, Bhatia, A, Selimovic, D, Tajik, A, Larouche, J et al.. Machine learning models can predict subsequent publication of North American Spine Society (NASS) annual general meeting abstracts. PLoS One. 2023;18 (8):e0289931. doi: 10.1371/journal.pone.0289931. PubMed PMID:37607198 PubMed Central PMC10443859.
  5. Bonello, JP, Koucheki, R, Abbas, A, Lex, J, Nucci, N, Yee, A et al.. Comparison of major spine navigation platforms based on key performance metrics: a meta-analysis of 16,040 screws. Eur Spine J. 2023;32 (9):2937-2948. doi: 10.1007/s00586-023-07865-4. PubMed PMID:37474627 .
  6. Dandurand, C, Mashayekhi, MS, McIntosh, G, Street, JT, Fisher, CG, Finkelstein, J et al.. Patient, clinical, surgical, and institutional factors associated with length of stay in scheduled degenerative thoracolumbar spine surgery: National Multicenter Cohort Analysis from the Canadian Spine Outcomes and Research Network. J Neurosurg Spine. 2023;38 (4):446-456. doi: 10.3171/2022.11.SPINE22662. PubMed PMID:36681949 .
  7. Frihagen, F, Comeau-Gauthier, M, Axelrod, D, Bzovsky, S, Poolman, R, Heels-Ansdell, D et al.. Who, if anyone, may benefit from a total hip arthroplasty after a displaced femoral neck fracture?: a post hoc subgroup analysis of the HEALTH trial. Bone Jt Open. 2022;3 (8):611-617. doi: 10.1302/2633-1462.38.BJO-2022-0074.R1. PubMed PMID:35909342 PubMed Central PMC9422900.
  8. Cushnie, D, Soroceanu, A, Stratton, A, Dea, N, Finkelstein, J, Bailey, CS et al.. Outcome of spine surgery in patients with depressed mental states: a Canadian spine outcome research network study. Spine J. 2022;22 (10):1700-1707. doi: 10.1016/j.spinee.2022.05.012. PubMed PMID:35671946 .
  9. Borges, FK, Devereaux, PJ, Cuerden, M, Sontrop, JM, Bhandari, M, Guerra-Farfán, E et al.. Accelerated Surgery Versus Standard Care in Hip Fracture (HIP ATTACK-1): A Kidney Substudy of a Randomized Clinical Trial. Am J Kidney Dis. 2022;80 (5):686-689. doi: 10.1053/j.ajkd.2022.01.431. PubMed PMID:35346742 .
  10. Iorio-Morin, C, Fisher, CG, Abraham, E, Nataraj, A, Attabib, N, Paquet, J et al.. Low-back pain after lumbar discectomy for disc herniation: what can you tell your patient?. J Neurosurg Spine. 2021;35 (6):715-721. doi: 10.3171/2021.2.SPINE201625. PubMed PMID:34450579 .
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Affiliations & Other Activities

  • Assistant Professor, Division of Orthopaedic Surgery, University of Toronto
  • Assistant Professor, University of Toronto Spine Program, University of Toronto