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Nathan N. O'Hara, PhD, MHA

Academic Title:

Assistant Professor

Primary Appointment:


Secondary Appointment(s):

Epidemiology & Public Health

Administrative Title:

Research Administrator

Phone (Primary):

(410) 328-9579

Education and Training

University of British Columbia, BComm, 2006

University of British Columbia, MHA, 2013

University of Amsterdam, PhD, 2021


My research focuses on empirical methods to improve the delivery of healthcare services, integrate patient preferences in clinical trial design, and reduce the socioeconomic consequences of orthopaedic injuries. 

Research/Clinical Keywords

health economics; patient preferences; socioeconomic impacts; orthopaedic trauma; global health; clinical trials

Highlighted Publications

O'Toole RV, Stein DM, Frey KP, O'Hara NN, Scharfstein DO, Slobogean GP, Taylor TJ, Haac BE, Carlini AR, Manson TT, Sudini K, Mullins CD, Wegener ST, Firoozabadi R, Haut ER, Bosse MJ, Seymour RB, Holden MB, Gitajn IL, Goldhaber SZ, Eastman AL, Jurkovich GJ, Vallier HA, Gary JL, Kleweno CP, Cuschieri J, Marvel D, Castillo RC; METRC. PREVENTion of CLots in Orthopaedic Trauma (PREVENT CLOT): a randomised pragmatic trial protocol comparing aspirin versus low-molecular-weight heparin for blood clot prevention in orthopaedic trauma patients. BMJ Open. 2021 Mar 24;11(3):e041845. 

Major Extremity Trauma Research Consortium (METRC). Effect of Intrawound Vancomycin Powder in Operatively Treated High-risk Tibia Fractures: A Randomized Clinical Trial. JAMA Surg. 2021 Mar 24:e207259. 

O'Hara NN, Slobogean GP, Klazinga NS, Kringos DS. Analysis of Patient Income in the 5 Years Following a Fracture Treated Surgically. JAMA Netw Open. 2021 Feb 1;4(2):e2034898. 

O'Hara NN, Kringos DS, Slobogean GP, Degani Y, Klazinga NS. Patients Place More of an Emphasis on Physical Recovery Than Return to Work or Financial Recovery. Clin Orthop Relat Res. 2020 Nov 24. 

O’Hara NN, Pollak AN, Welsh CJ, O’Hara LM, Kwok AK, Herman A, Slobogean GP. Factors Associated With Persistent Opioid Use Among Injured Workers’ Compensation Claimants. JAMA Network Open. 2018;1(6):e184050. doi:10.1001/jamanetworkopen.2018.4050

O’Hara NN, Mugarura R, Potter J, Stephens T, Rehavi MM, Francois P, Blachut PA, O’Brien PJ, Mezei A, Beyeza T, Slobogean GP. The socioeconomic implications of isolated tibia and femur fracture from road traffic injuries in Uganda. J Bone Joint Surg Am. J Bone Joint Surg Am. 2018 Apr 4;100(7):e43. 

O’Hara NN, Slobogean GP, Mohammadi T, Marra C, Vicente M, Khakban A, McKee M. Are patients willing to pay for total shoulder arthroplasty? Evidence from a discrete choice experiment. Can J Surg. 2016 Apr;59(2):107-12.

O’Hara NN, Roy, L, O’Hara LM, Lynd L, Yassi A, Nophale L, Spiegel JM, Marra CA. Healthcare Worker Preferences for Active Tuberculosis Case Finding Programs in South Africa: A Best-Worst Scaling Choice Experiment. PLoS One. 2015 Jul 21;10(7):e0133304.



Awards and Affiliations

2020 Highlight Paper, Orthopaedic Trauma Association Annual Meeting                         

One-Year Results of a Prospective Randomized Controlled Trial of Operative Versus Nonoperative Fixation of Minimally Displaced Lateral Compression Pelvis Fractures: Secondary Analysis of Previously Reported Short-Term Results

2020 Bovil Award for Top Paper at the Orthopaedic Trauma Association Annual Meeting

Vitamin D3 Supplementation Does Not Improve Fracture Healing: A Double-Blinded Randomized Controlled Trial

2019 Highlight Paper, Orthopaedic Trauma Association Annual Meeting                      

A Prospective Clinical Trial Comparing Operative Versus Nonoperative Fixation of Minimally Displaced Lateral Compression Pelvic Fractures

2016 Highlight Paper, Orthopaedic Trauma Association Annual Meeting                     

Are large clinical trials justified?                                            

2016 Orthopaedics Blue Ribbon Paper Award

Timing of hip fracture surgery & 30-day outcomes

2015 Highlight Paper, Orthopaedic Trauma Association Annual Meeting                         

Femoral neck shortening is associated with worse functional outcomes

Grants and Contracts

Agency for Healthcare Research and Quality (1R03HS027218-01A1)                      

The Economic Impact of Avoidable Healthcare-Associated Infections on Traumatic Extremity Fracture Patients

(Principal Investigator)


US Department of Defense (OR 190099) – (Pensy, PI)                                 

Can Preoperative Skin Perfusion Predict Wound Healing Complications in High- Risk Peri-Articular Tibial Fracture Fixation



National Institutes of Health (NIAMS R01) – (Gitajn, PI)                                       

Real-time fluorescence-based measurement of bone perfusion in post-traumatic infection



US Department of Defense (W81XWH1910848) – (O’Toole, PI)                   

Novel Topical Antibiotic Therapy to Reduce Infection After Operative Treatment of Fractures at High Risk of Infection: TOBRA-A Multicenter RCT



Osteosynthesis and Trauma Care Foundation – Research Grant                

Psychosocial Recovery After Injury: Determining the Optimal Timing and Subgroups for Interventions

(Principal Investigator)


PCORI – Pragmatic Study (Slobogean, PI)

PREPARE: Pragmatic Randomized Trial Evaluating Preoperative Antiseptic Skin Solutions in Fractured Extremities



PCORI – Pragmatic Study (O'Toole, PI)

A Randomized Pragmatic Trial Comparing the Complications and Safety of Blood Clot Prevention Medicines Used in Orthopedic Trauma Patients


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