Henry Ahn


Associate Scientist, Li Ka Shing Knowledge Institute


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. Ayling, OGS, Ailon, T, McIntosh, G, Soroceanu, A, Hall, H, Nataraj, A et al.. Clinical outcomes research in spine surgery: what are appropriate follow-up times?. J Neurosurg Spine. 2018;30 (3):397-404. doi: 10.3171/2018.8.SPINE18715. PubMed PMID:30579264 .
  2. Ailon, T, Tee, J, Manson, N, Hall, H, Thomas, K, Rampersaud, YR et al.. Patient-reported outcomes following surgery for degenerative spondylolitshtesis: comparison of a universal and multitier health care system. Spine J. 2019;19 (1):24-33. doi: 10.1016/j.spinee.2018.10.005. PubMed PMID:30312774 .
  3. Sprague, S, Tornetta, P 3rd, Slobogean, GP, O'Hara, NN, McKay, P, Petrisor, B et al.. Are large clinical trials in orthopaedic trauma justified?. BMC Musculoskelet Disord. 2018;19 (1):124. doi: 10.1186/s12891-018-2029-3. PubMed PMID:29678204 PubMed Central PMC5909275.
  4. Sprague, S, Schemitsch, EH, Swiontkowski, M, Della Rocca, GJ, Jeray, KJ, Liew, S et al.. Factors Associated With Revision Surgery After Internal Fixation of Hip Fractures. J Orthop Trauma. 2018;32 (5):223-230. doi: 10.1097/BOT.0000000000001162. PubMed PMID:29677091 PubMed Central PMC5986292.
  5. Sprague, S, Bhandari, M, Heetveld, MJ, Liew, S, Scott, T, Bzovsky, S et al.. Factors associated with health-related quality of life, hip function, and health utility after operative management of femoral neck fractures. Bone Joint J. 2018;100-B (3):361-369. doi: 10.1302/0301-620X.100B3.BJJ-2017-0853.R1. PubMed PMID:29589490 .
  6. Sprague, S, Petrisor, B, Jeray, K, McKay, P, Heels-Ansdell, D, Schemitsch, E et al.. Wound irrigation does not affect health-related quality of life after open fractures: results of a randomized controlled trial. Bone Joint J. 2018;100-B (1):88-94. doi: 10.1302/0301-620X.100B1.BJJ-2017-0955.R1. PubMed PMID:29305456 PubMed Central PMC6413805.
  7. Sprague, S, Slobogean, GP, Bogoch, E, Petrisor, B, Garibaldi, A, O'Hara, N et al.. Vitamin D Use and Health Outcomes After Surgery for Hip Fracture. Orthopedics. 2017;40 (5):e868-e875. doi: 10.3928/01477447-20170907-01. PubMed PMID:29039872 .
  8. Shojaei, MH, Alavinia, M, Craven, BC, Cheng, CL, Plashkes, T, Shen, T et al.. Abstracts and Workshops 7th National Spinal Cord Injury Conference November 9 - 11, 2017 Fallsview Casino Resort Niagara Falls, Ontario, Canada. J Spinal Cord Med. 2017;40 (6):813-869. doi: 10.1080/10790268.2017.1369666. PubMed PMID:29034821 PubMed Central PMC5778945.
  9. Dvorak, MF, Cheng, CL, Fallah, N, Santos, A, Atkins, D, Humphreys, S et al.. Spinal Cord Injury Clinical Registries: Improving Care across the SCI Care Continuum by Identifying Knowledge Gaps. J. Neurotrauma. 2017;34 (20):2924-2933. doi: 10.1089/neu.2016.4937. PubMed PMID:28745934 PubMed Central PMC5653140.
  10. Rivers, CS, Fallah, N, Noonan, VK, Whitehurst, DG, Schwartz, CE, Finkelstein, JA et al.. Health Conditions: Effect on Function, Health-Related Quality of Life, and Life Satisfaction After Traumatic Spinal Cord Injury. A Prospective Observational Registry Cohort Study. Arch Phys Med Rehabil. 2018;99 (3):443-451. doi: 10.1016/j.apmr.2017.06.012. PubMed PMID:28732686 .
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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