Samuel Nwosu, MS

Biostatistician IV

MCN Phone: 615.875.6971
VA Phone: 615.873.8016
Vanderbilt University School of Medicine
Department of Biostatistics
D-2220 Medical Center North and A-416(VA)
Nashville, TN 37232-2158


Master of Science - concentration Biostatistics, December 2007
Middle Tennessee State University

Bachelor of Science in Mathematics, December 2003
Tennessee State University

Work Experience

Biostatistician IV, December 2017 - Present
Department of Biostatistics, Vanderbilt University

Biostatistician IIl, March 2011 - November 2017
Department of Biostatistics, Vanderbilt University

Biostatistician II, January 2008 - February 2011
Department of Biostatistics, Vanderbilt University

Graduate Intern-Biostatistician, May 2007 - December 2007
United South and Eastern Tribes(USET), Nashville,TN

Computer Skills

  • Statistical software: R, SAS, PS, beginner user of Stata
  • Reporting software/tools: Sweave, knitr, LaTeX, REDCap, Beamer, FileMaker Pro Versions 7-10
  • Operating systems: Linux, Windows

Research Interests

  • Observational studies
  • Time to event analysis
  • Clinical trials
  • Competing risk event analysis
  • Categorical data analysis

CQI Project

Peer-Reviewed Publications

  1. T Sperof, S Nwosu , R Greevy, M B Weinger, T R Talbot, R J Wall, J K Deshpande, DJ France, E W Ely, H Burgess, J Englebright, M V Williams, R S Dittus. Organisational culture: Variation across hospitals and connection to patient safety climate. Quality and Safety in Health Care 12/2010; 19(6):592-6.
  2. Theodore Sperof PhD, MPH E. Wes Ely MD, Robert Greevy PhD, MS Matthew B.Weinger MD, MPH Thomas R. Talbot MD, MPH Richard J. Wall MD, MPH Jayant K.Deshpande MD, MPH Daniel J. France PhD, Sam Nwosu MS , BCPP Hayley Burgess PharmD, PhD Jane Englebright RN, Mark V. Williams MD, FHM, FACP, MPH Robert S. Dittus MD. Quality Improvement Projects Targeting Health Care-Associated Infections: Comparing Virtual Collaborative and Toolkit Approaches. J Hosp Med. 2011 May;6(5):271-8. doi: 10.1002/jhm.873. Epub 2011 Feb 10.
  3. T Sperof PhD, P Sinnot PT PhD, B Marx PhD, R Owen MD, J Jackson PsyD, R Greevy PhD, M Murdoch MD; N Sayer PhD, A Shane BA, P Schnurr, J Smith PhD, J Alvarez MS, S Nwosu MS , and the E3-PTSD Study Team. Impact of Evidence-Based Standardized Assessment on the Disability Clinical Interview for Diagnosis of Service-Connected PTSD: A Cluster -Randomized Trial. Journal of Traumatic Stress 12/2012; 25(6):607-15.
  4. Marc I. Rosen, M.D., David Afshartous, Ph.D., Sam Nwosu, M.S. , Melanie C. Scott, Psy.D., James C. Jackson, Ph.D., Brian Marx, Ph.D., Patsi Sinnot, Ph.D., Ted Sperof, Ph.D. Racial Differences in Veterans' Satisfaction With Examination of Disability From Posttraumatic Stress Disorder. Psychiatric services (Washington, D.C.) 01/2013; 64(4).
  5. Jennifer C Esbenshade, Kathryn M Edwards, Adam J Esbenshade, Vanessa E Rodriguez, H Keipp Talbot, Marlon F Joseph, Samuel K Nwosu , James D Chappell, James E Gern, John V Williams, Thomas R Talbot. Respiratory Virus Shedding in a Cohort of On-Duty Healthcare Workers Undergoing Prospective Surveillance. Infection Control and Hospital Epidemiology 04/2013; 34(4):373-8.
  6. Uchechukwu K.A. Sampson, Frank E. Harrell Jr, Sergio Fazio, Sam Nwosu, Nate Mercaldo, George A. Mensah, Michael H. Davidson, Steve B. Feinstein. CAROTID ADVENTITIAL NEOVASCULARIZATION AND INTIMA-MEDIA THICKNESS AS MARKERS OF ATHEROGENESIS: EVIDENCE FROM TWO RANDOMIZED CONTROLLED TRIALS. Journal of the American College of Cardiology 03/2013; 61(10).
  7. Wallston KA, Slagle JM, Sperof T, Nwosu S , Crimin K, Feurer ID, Boettcher B, Weinger MB. Operating room clinicians' ratings of workload: a vignette simulation study. Journal of patient safety. 2014 Jun;10(2). 95-100.
  8. Frank R Avilucea, Sarah E Greenberg, W Jeffrey Grantham, Vasanth Sathiyakumar, Rachel V Thakore, Samuel K Nwosu , Kristin R Archer, William T Obremskey, Hassan R Mir, Manish K Sethi. The Costs of Operative Complications for Ankle Fractures: A Case Control Study. Advances in Orthopedics Volume 2014 (2014), Article ID 709241.
  9. Susan P. Bell, J,ohn Schnelle, Samuel Nwosu , Jonathan Schildcrout, Kathryn Goggins, Sunil Kripalani. Vulnerability to Functional Decline in Women Hospitalized With Cardiovascular Disease. Journal of Women's Health 10/2014; 23(10):852-852.
  10. Rick W. Wright, Laura J. Huston, Amanda K. Haas, Kurt P. Spindler, Sam K. Nwosu , Christina R. Allen, Allen F. Anderson, Daniel E. Cooper, Thomas M. DeBerardino , Warren R. Dunn, Timothy N. Taft, Joachim J. Tenuta, Edwin M. Tingstad, Armando F. Vidal, Darius G. Viskontas, Richard A. White, James S. Williams, Michelle L. Wolcott, Brian R. Wolf, James J. York. Effect of Graft Choice on the Outcome of Revision Anterior Cruciate Ligament Reconstruction in the Multicenter ACL Revision Study (MARS) Cohort. The American Journal of Sports Medicine 10/2014; 42(10):2301-2310.
  11. Kathryn M Goggins, Kenneth A Wallston, Samuel Nwosu , Jonathan S Schildcrout, Liana Castel, Sunil Kripalani For The Vanderbilt Inpatient Cohort Study Vics. Health Literacy, Numeracy, and Other Characteristics Associated With Hospitalized Patients' Preferences for Involvement in Decision Making. Journal of Health Communication 10/2014; 19 Suppl 2(sup2):29-43.
  12. Amanda S Mixon, Amy P Myers, Cardella L Leak, J. Mary Lou Jacobsen, Courtney Cawthon, Kathryn M Goggins, Samuel Nwosu , Jonathan S Schildcrout, John F Schnelle, Theodore Sperof, Sunil Kripalani. Characteristics Associated With Postdischarge Medication Errors. Mayo Clinic Proceedings 07/2014; 89(8).
  13. Uchechukwu K A Sampson, Frank E Harrell, Sergio Fazio, Sam Nwosu , Nate Mercaldo, George A Mensah, Michael H Davidson, Blai Coll, Steve B Feinstein. Carotid Adventitial Vasa Vasorum and Intima-Media Thickness in a Primary Prevention Population. Echocardiography 06/2014; 32(2).
  14. Charles L Cox, Laura J Huston, Warren R Dunn, Emily K Reinke, Samuel K Nwosu , Richard D Parker, Rick W Wright, Christopher C Kaeding, Robert G Marx, Annunziata Amendola, Eric C McCarty , Kurt P Spindler. Are Articular Cartilage Lesions and Meniscus Tears Predictive of IKDC, KOOS, and Marx Activity Level Outcomes After Anterior Cruciate Ligament Reconstruction? A 6-Year Multicenter Cohort Study. The American Journal of Sports Medicine 03/2014; 42(5).
  15. Petra A Prins, Michael F Hill, David Airey, Sam Nwosu , Prudhvidhar R Perati, Hagai Tavori, MacRae F. Linton, Valentina Kon, Sergio Fazio, Uchechukwu K Sampson. Angiotensin-Induced Abdominal Aortic Aneurysms in Hypercholesterolemic Mice: Roleof Serum Cholesterol and Temporal Effects of Exposure. PLoS ONE 01/2014; 9(1):e84517.
  16. Susan P Bell, John Schnelle, Samuel K Nwosu , Jonathan Schildcrout, Kathryn Goggins, Courtney Cawthon, Amanda S Mixon, Eduard E Vasilevskis, Sunil Kripalani for the Vanderbilt Inpatient Cohort Study (VICS). Development of a multivariable model to predict vulnerability in older American patients hospitalised with cardiovascular disease. BMJ Open 08/2015; 5(8).
  17. D Wasserstein, L J Huston, S. Nwosu , MOON Group, Spindler KP. KOOS Pain as a Marker for Signi cant Knee Pain Two and Six Years after Primary ACL Reconstruction: A Multicenter Orthopaedic Outcomes Network (MOON) Prospective Longitudinal Cohort Study. Osteoarthritis and Cartilage 06/2015.
  18. Robert H Brophy, Amanda K Haas, Laura J Huston, Samuel K Nwosu , Rick W Wright. Association of Meniscal Status, Lower Extremity Alignment, and Body Mass Index With Chondrosis at Revision Anterior Cruciate Ligament Reconstruction. The American Journal of Sports Medicine 04/2015; 43(7).
  19. Amanda S. Mixon, Kathryn Goggins, Susan P. Bell, Eduard E. Vasilevskis, Samuel Nwosu , Jonathan S. Schildcrout, Sunil Kripalani. Preparedness for hospital discharge and prediction of readmission. Journal Hospital Medicine. 2016 Sep;11(9):603-9.
  20. Justin M. Bachmann, Kathryn M. Goggins, Samuel K. Nwosu , Jonathan S Schildcrout, Sunil Kripalani, Kenneth A Wallston. Patient Education and Counseling. 2016 Dec;99(12):2071-2079. doi: 10.1016/j.pec.2016.07.020.

Presentations & Posters

  1. Rangarajan, Soumya, Slagle, Jason M., Nwosu, Samuel K., Byrd, Edward E., Zimmerman, Matthew, Crimin, Kimberly S., Spero , Theodore, Weinger, Matthew B. Perceptions of Intraoperative Clinical Workload among OR Team Members. American Society of Anesthesiologists Conference, San Diego, CA..
  2. Weinger MB, Slagle JS, Crimin K, Nwosu S, Feinleib J, Schroeder R, Shively M, Pousman R, Byrd E, Zimmerman M, Wallston K, Feurer I, Messina V, Singh R, Namvar D, Schwartz T, Perfect R, France D, and Sperof T. Higher Pre- and Post-Case Workload Ratings by Anesthesia Providers, Surgeons, and OR Nurses are Associated with Non-Routine Events. American Society of Anesthesiologists Conference, Chicago, IL.
  3. Example of using Sweave to Create and Maintain a Large, Dynamic Statistical Report: ENAR, Washington, DC.
  4. Ordinal Logistic Regression with Clustered Data: Association of Predictors MeasuringVeterans Satisfaction on the Quality of their PTSD Examination. Continuing Education MS Meeting Dept of Biostatistics, Vanderbilt School of Medicine.

Topic revision: r22 - 18 Jul 2019, SamuelNwosu

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