Publications

Risk Prediction, Algorithmic Bias, and Machine Learning

• Khor S, Haupt EC, Hahn EE, Lyons LKL, Shankaran V, Bansal A. Racial and Ethnic Bias in Risk Prediction Models for Colorectal Cancer Recurrence When Race and Ethnicity Are Omitted as Predictors. JAMA Netw Open. 2023;6(6):e2318495.
• Khor S, Heagerty PJ, Basu A, Haupt EC, Lyons LKL, Hahn EE, Bansal A. Racial Disparities in the Ascertainment of Cancer Recurrence in Electronic Health Records. JCO Clin Cancer Inform. 2023 Jun;7:e2300004.
• Khor S, Lavallee D, Cizik AM, Bellabarba C, Chapman JR, Howe CR, Lu D, Mohit AA, Oskouian RJ, Roh JR, Shonnard N, Dagal A, Flum DR. Development and Validation of a Prediction Model for Pain and Functional Outcomes After Lumbar Spine Surgery. JAMA Surg. 2018 Jul 1;153(7):634-642.
• Rodriguez P, Heagerty PJ, Clark S, Haupt E, Hahn EE, Shankaran V, Khor S, Chen Y, Bansal A. Using machine learning to leverage biomarker change and predict colorectal cancer recurrence. JCO Clin Cancer Inform, 2023 Sep;7:e2300066.
• Lee W, Schwartz N, Bansal A, Khor S, Hammarlund N, Basu A, Devine B. A Scoping Review of the Use of Machine Learning in Health Economics and Outcomes Research: Part 1—Data From Wearable Devices, Value in Health, 2022 Sep 15:S1098-3015(22)02145-3. doi: 10.1016/j.jval.2022.08.005.
• Lee W, Schwartz N, Bansal A, Khor S, Hammarlund N, Basu A, Devine B. A Scoping Review of the Use of Machine Learning in Health Economics and Outcomes Research: Part 2—Data From Nonwearables. Value in Health. 2022 Aug 18:S1098-3015(22)02107-6. doi: 10.1016/j.jval.2022.07.011.
• Ehlers AP, Roy SB, Khor S, Mandagani P, Maria M, Alfonso-Cristancho R, Flum DR. Improved Risk Prediction Following Surgery Using Machine Learning Algorithms. EGEMS. 2017 Apr 20; 5(2):3. doi: 10.13063/2327-9214.1278.

Program and Policy Evaluation

• Khor S, Bansal A, Basu A, Shankaran V, Carlson JJ. Innovations Versus Health Equity? Effects of Cancer Treatment Advancements on Disparities in Mortality: A Quasi-Experimental Study. JCO Oncol Adv. 2025; 2:e2500026.
• Khor S, Carlson JJ, Basu A, Bansal A, Yu K, Fedorenko CR, Ramsey S, Shankaran V. The Association between New Cancer Therapy Innovations and Financial Toxicity. J Natl Cancer Inst. 2025 Jun 20:dfag152.
• Khor S, Lavallee DC, Cizik AM, Bellabarba C, Dagal A, Hart RA, Howe CR, Martz D, Shonnard N, Flum DR. Hospital and Surgeon Variation in Patient-reported Functional Outcomes after Lumbar Spine Fusion: A Statewide Evaluation. Spine (Phila Pa 1976). 2020;45(7):465–472.
• Marcotte L, Khor S, Flum D, Lavallee D, Wood DE, Triplette M, Akinsoto Nkem, Chaudhari V, Farjah F. Factors Associated with Lung Cancer Risk Factor Documentation within an Academic Health System. Am J Manag Care. 2023; 29(9)
• Mathias PC, Khor S, Harris K, Wood SJ, Farjah F. Evaluation of a Multilevel Laboratory Stewardship Intervention Targeted to Cardiac and Thoracic Surgical Services at an Academic Medical Center. Arch Pathol Lab Med. 2023 Aug 1;147(8):957-963.
• Dugdale DC, Khor S, Liao J, Flum DR. Association between a Population Health Intervention and Hypertension Control. J Gen Intern Med. 2022 Dec;37(16):4095-4102.
• Chang D, Carlo AD, Khor S, Drake L, Lee ES, Avery M, Unützer J, Flum DR. Transforming Population-Based Depression Care: a Quality Improvement Initiative Using Remote, Centralized Care Management. J Gen Intern Med. 2021 Feb;36(2):333-340.
• Cai Y, Chen Y, Xiao L, Khor S, Liu T, Han Y, Yuan Y, Cai L, Zeng G, Wang X. The Health and Economic Impact of Constructing Temporary Field Hospitals to Meet the COVID-19 Pandemic Surge: Wuhan Leishenshan Hospital in China as a Case Study. J Glob Health. 2021 Dec 4;11:05023.
• Bhattacharyya O, Khor S, McGahan A, Dunne D, Daar AS, Singer PA. Innovative health service delivery models in low and middle income countries – what can we learn from the private sector? Health Research Policy and Systems. 2010, 8:24. (listed by BioMed Central as a “highly accessed” article)
• Leung GKK, Wong ATY, Kwan EYC, Khor S, Fan YW. Extradural Haematoma – a five-year audit at a tertiary trauma centre in Hong Kong. Asian J Surg 2001;24(3):305-309.

Health Disparities and Financial Toxicity

• Khor S, Elsisi ZA, Carlson JJ. How much does the US Public Value Equity in Health? A Systematic Review. Value in Health. 2023 Mar;26(3):418-426.
• Khor S, Bansal A, Basu A, Shankaran V, Carlson JJ. Innovations Versus Health Equity? Effects of Cancer Treatment Advancements on Disparities in Mortality: A Quasi-Experimental Study. JCO Oncol Adv. 2025; 2:e2500026.
• Khor S, Carlson J, Basu A, Bansal A, Yu K, Fedorenko CR, Ramsey S, Shankaran V. The Association between New Cancer Therapy Innovations and Financial Toxicity. J Natl Cancer Inst. 2025 Jun 20:dfag152.
• Marcotte LM, Khor S, Wong ES, Akinsoto N, Lee ES, Onstad S, Issaka RB.  A Pilot Analysis of Patient Portal Use and Breast Cancer Screening among Black Patients in a Large Academic Health System. AJPM Focus. 2024 Nov 22;4(1):100305.
• Marcotte LM, Khor S, Reddy A, Morenz A, Nelson K, Akinsoto N, Lee ES, Onstad S, Wong ES. An analysis of multilevel factor contributions to breast cancer screening inequities in an academic health system. Cancer. 2025 Feb 1;131(3):e35734.
• Shankaran V, Li L, Fedorenko C, Sanchez H, Du Y, Khor S, Kreizenbeck K, Ramsey S. Risk of Adverse Financial Events in Cancer Patients: Evidence from a Novel Linkage between Cancer Registry and Credit Records. J Clin Oncol. 2022; 40:8; 884-891.
• Doll KM, Khor S, Odem-Davis K, He H, Wolff EM, Flum DR, Ramsey SD, Goff BA. Role of Bleeding Recognition and Evaluation in Black-White Disparities in Endometrial Cancer. Am J Obstet Gynecol. 2018 Dec;219(6):593.e1-593.e14.

Comparative Effectiveness and Outcomes Research

• Khor S, Beca J, Krahn M, Hodgson D, Lee L, Crump M, Bremner KE, Luo J, Mamdani M, Bell CM, Sawka C, Gavura S, Sullivan T, Trudeau M, Peacock S, Hoch JS. Real World Costs and Cost-effectiveness of Rituximab for Diffuse Large B-Cell Lymphoma Patients: A Population-based Analysis. BMC Cancer. 2014 Aug 12;14:586.
• Hysa L, Khor S, Starnes BW, Chow WB, Sweet MP, Nguyen J, Shalhub S. Cause-Specific Mortality of Type B Aortic Dissection and Assessment of Competing Risks of Mortality. J Vasc Surg. 2020;S0741-5214(20)31112-5.
• Shonnard NH, Berven S, Anderson PA, Verschuyl E, Norwitz J, Shonnard N, Khor S, Wagoner DD, Beall DP. Appropriate Management of Vertebral Fragility Fractures: Development of a Pathway Based upon a Vertebral Compression Fracture Registry. Pain Physician. 2020;23(4):E343-E352.
• Thompson R, Khor S, Thornblade LW, Flum DR, Sobel M. The Paradox of Hyperglycemia and Surgical Outcomes in Patients with and without Diabetes. Surg Infect (Larchmt). 2019 May/Jun;20(4):338-339.
• Nevidomskyte D, Tang GL, Shin SH, Hatsukami TS, Khor S, Flum DR, Meissner MH, Shalhub S. Comparison of outcomes in women and men following carotid interventions in the Washington state’s Vascular Interventional Surgical Care and Outcomes Assessment Program. J Vasc Surg. 2019;69(4):1121–1128. 21.
• Murphy CE, McCormick KA, Shankaran V, Reddi DM, Swanson PE, Upton MP, Papanicolau-Sengos A, Khor S, Westerhoff M. Grade Assignment by Ki-67 Proliferative Index, Mitotic Count, and Phosphohistone H3 Count in Surgically Resected Gastrointestinal and Pancreatic Neuroendocrine Tumors. Pancreas. 2017 Nov/Dec; 46(10):1359-1365.
• Ehlers AP, Khor S, Shonnard N, Oskouian RJ Jr, Sethi RK, Cizik AM, Lee MJ, Bederman S, Anderson PA, Dellinger EP, Flum DR. Intra-Wound Antibiotics and Infection in Spine Fusion Surgery: A Report from Washington State’s SCOAP-CERTAIN Collaborative. Surg Infect. 2016 Apr; 17(2):179-86.

Patient-reported Outcomes

• Khor S, Flum DR, Strate LL, Hantouli MN, Harris HH, Lavallee DC, Spiegel BMR, Davidson GH. Establishing Clinically Significant Patient-reported Outcomes for Diverticular Disease. Journal of Surgical Research. 2021; 264: 20-29. doi: 10.1016/j.jss.2021.01.045.
• Khor S, Lavallee D, Cizik AM, Bellabarba C, Chapman JR, Howe CR, Lu D, Mohit AA, Oskouian RJ, Roh JR, Shonnard N, Dagal A, Flum DR. Development and Validation of a Prediction Model for Pain and Functional Outcomes After Lumbar Spine Surgery. JAMA Surg. 2018 Jul 1;153(7):634-642.
• Hantouli MN, Droullard DJ, Khor S, Strate LL, Lavallee DC, Flum DR, Davidson GH. Indications for surgical treatment of diverticulitis: factors that influence surgical decision-making for patients and surgeons. British Journal of Surgery. 2022, doi:10.1093/bjs/znac321
• Hantouli MN, Khor S, Strate LL, Lavallee DC, Mower WR, Porter AJ, Flum DR, Davidson GH. What’s in a Number? Assessing the Burden of Diverticular Disease. Annals of Surgery Open. 2022; 3(4): e202.
• Ehlers AP, Khor S, Cizik AM, Leveque JA, Shonnard NS, Oskouian RJ Jr, Flum DR, Lavallee DC. Use of patient-reported outcomes and satisfaction for quality assessments. Am J Manag Care. 2017 Oct; 23(10):618-622.
• Lee L, Crump M, Khor S, Hoch JS, Luo J, Bremner K, Krahn M, Hodgson DC. Impact of rituximab on treatment outcomes of patients with diffuse large b-cell lymphoma: a population-based analysis. Br J Haematol. 2012 Aug;158(4):481-8.