Doug Lorenz, PhD

Bioinformatics and Biostatistics

Associate Professor
Room No. 134, 485 E. Gray St.
Louisville, KY 40202
Phone: 502-852-3635

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My Bibliography


PhD (2011), Applied and Industrial Mathematics, University of Louisville
MSPH (2002), Biostatistics-Decision Science, University of Louisville
MA (2001), Mathematics, University of Louisville
BS (1999), Mathematics, English Minor, University of Louisville

I joined the Department of Bioinformatics and Biostatistics in 2003, as a statistician with the Statistical Consulting Center. I collaborated with over one hundred investigators within and outside the University of Louisville and published numerous collaborative papers. In Fall of 2011, I joined the faculty of the Department of Bioinformatics and Biostatistics as an assistant professor. I've previously collaborated with Susan Harkema, PhD, Rehabilitation Research Director of the Kentucky Spinal Cord Injury Research Center, Owsley B. Frazier Chair in Neurological Rehabilitation, and Professor in the Department of Neurological Surgery on various projects related neurological rehabilitation of spinal cord injury. I also collaborate with Mary Clyde Pierce, MD of Lurie Children’s Hospital in Chicago in research predicting child abuse in the pediatric emergency setting. I am currently the instructor and course director for the introductory sequence in biostatistics for MPH students (PHST 500-501).


My primary research interest is in the analysis of clustered data, and in particular, issues of cluster size informativeness and within-cluster group distribution informativeness. My methodological papers in this area have focused on the development of clustered data analogues of classical nonparametric procedures from i.i.d. theory.  I also have particular interest in survival analysis and multi-state models, an important generalization of survival data and special case of multivariate survival data. I have a growing interest in Bioinformatics, and in particular the analysis of data from next generation sequencing (NGS).


PHST 500-501 – Introduction to Biostatistics I and II
PHST 602 – Biostatistics Seminar Series
PHST 603 – Biostatistics Practicum
PHST 624 – Clinical Trials
PHST 650 – Intermediate Biostatistics for Health Sciences
PHST 666 – Master's Thesis Research
PHST 681 – Biostatistical Methods II
PHST 683 – Survival Analysis
PHST 703 - Doctoral Practicum in Biostatistics
PHST 726 – Clinical Trials Statistics Laboratory
PHST 762 – Advanced Statistical Inference
PHST 783 – Advanced Survival Analysis
PHPH 697 – Public Health Practicum

Professional Memberships and Certifications

I am a member of the American Statistical Association (ASA), treasurer of the Kentucky Chapter of the ASA, and was acrredited by the ASA in 2010 (PStat®).  I am an elected member of Delta Omega (Beta Pi Chapter), the national public health honor society, and a Commonwealth Scholar of the Commonwealth Institute of Kentucky.

Research Funding

Pierce, M.C. (PI). RFA-HD-18-012. Center for Evidence and Epigenetics in Early Childhood Abuse (CE3CA). Department of Health and Human Services, National Institutes of Health, Eunice Kennedy Shriver National Institute of Child Health and Human Development. CAPSTONE Centers for Multidisciplinary Research in Child Abuse and Neglect. Role: Co-Investigator. (Pending)

Pierce MC (PI). Clinical Decision Rules to Discriminate Bruising Caused by Physical Child Abuse. Department of Health and Human Services, National Institutes of Health, Eunice Kennedy Shriver National Institute of Child Health and Human Development. 1R01HD060997-01A2. 4/2011 through 4/2016 (NCE through 2017). Role: Co-investigator

Harkema, S.J. (PI). ES2-CHN-2013(SH). Recovery of Cardiovascular Function with Epidural Stimulation After Human Spinal Cord Injury Christopher and Dana Reeve Foundation. Role: Biostatistician.

Behrman, A. (PI). Award No. 260284. Neuromuscular Recovery Scale for Pediatric Spinal Cord Injury. Craig
H. Neilsen Foundation. Role: Co-Principal Investigator.

Harkema, S.J. (PI). 1U59DD000838. Development of Neural Recovery Rehabilitation and Research Centers
for Functional Health and Quality of Life Improvements after Neurologic Injury: The NeuroRecovery
Network Christopher and Dana Reeve Foundation. Role: Biostatistician.

Ovechkin A. (PI). NIH. R01HL103750-04. Respiratory motor control and blood pressure regulation after spinal cord injury. Department of Health and Human Services, National Institutes of Health. Role: Co-PI

Behrman, A. (PI). Award No. 164521. A New Measure of Neurological and Behavioral Recovery after Spinal Cord Injury. Craig H. Nielsen Foundation. Role: Co-Principal Investigator.

Sisto, S.A. (PI). Health Outcomes after Locomotor Training across the NeuroRecovery Network. Craig H. Neilsen Foundation. Role: Co-Principal Investigator.

Harkema, S.J. (PI). NOA3-2010(SH) Natural Progression & Recovery of Cardiovascular Parameters Following Traumatic Spinal Cord Injury. Christopher and Dana Reeve Foundation. Role: Biostatistician.

Harkema, S.J. (PI). 5R01NS049209 Plasticity of Human Spinal Neural Networks After Injury. National Institutes of Health. Role: Biostatistician.

Pfieffer, M.P. (PI). 1R21CA115345. A Telehealth Intervention to Improve Symptom Management for Patients with Head and Neck Cancer. National Cancer Institute, National Institutes of Health. Role: Biostatistician.

Ruble, L.A. (PI). 1R34MH073071. Outcomes of Teacher Training on Autism. Department of Health and Human Services, National Institutes of Health. Role: Biostatistician.

Barnett, R. (PI). PO25900700013372. Air Toxic Monitoring and Risk Management Program. Kentucky Natural Resource Council. Role: Co-Principal Investigator.

Newton, T.L. (PI). R21AG0249002-02. Intimate partner violence and inflammatory processes. National Insititute on Aging, National Institutes of Health. Role: Biostatistical consultant.


Book Chapters

  1. Datta, S., Lorenz, D.J., Datta, S. Approximate U-statistics for State Waiting Times Under Right Censoring. In Modern Nonparametric, Robust and Multivariate Methods: Festschrift in Honour of Hannu Oja, Springer International Publishing Switzerland. 2015.
  2. Lorenz, D.J., Gill, R.S., Mitra, R., Datta, S. Using RNA-seq Data to Detect Differentially Expressed Genes. In Statistical Analysis of Next Generation Sequence Data, Springer-Verlag. 2014.

Methodological Manuscripts

  1. Gregg, M.E., Datta, S., Lorenz, D.J. A log rank test for clustered data with informative within-cluster group size. Statistics in Medicine. In revision.
  2. Lorenz, D.J., Levy, S., Datta, S. Inferring marginal association with paired and unpaired clustered data. Statistical Methods in Medical Research. 2016. 2016 Sep 20. pii: 0962280216669184. DOI: 10.1177/0962280216669184.
    PMID: 27655806.
  3. Lorenz, D.J., Datta, S. A nonparametric analysis of waiting times from a multistate model using a novel linear hazards model approach. Electronic Journal of Statistics. 2015; 9: 419-443. DOI: 10.1214/15-EJS1003.
  4. Lorenz, D.J., Datta S. Comparing waiting times in a multi-stage model: A log-rank approach. Journal of
    Statistical Planning and Inference
    . 2012; 142(10): 2832-2843. DOI: 10.1016/j.jspi.2012.04.003.
  5. Lorenz, D.J., Datta, S., Harkema S.J. Marginal association measures for clustered data. Statistics in Medicine.
    30 Nov. 2011; 30(27): 3181-91. DOI: 10.1002/sim.4368. PMID: 21953204.

Selected Collaborative Manuscripts

  1. Young, A., Pierce, M.C., Kaczor, K., Lorenz, D.J., Hickey, S., Berger, S.P., Schmidt, S.M., Fingarson, A., Fortin, K., Thompson, R. Are negative/unrealistic parent descriptors of infant attributes associated with physical abuse? Child Abuse and Neglect. Revision submitted.
  2. Lorenz, D.J., Pierce, M.C., Kaczor, K., Berger, R.P., Bertocci, G., Herman, B.E., Herr, S., Hymel, K.P., Jenny, C., Leventhal, J.M., Sheehan, K., Zuckerbraun, N. Classifying injuries in young children as abusive or accidental: reliability and accuracy of an expert panel approach. Journal of Pediatrics. Accepted.
  3. Pierce, M.C., Kaczor, K., Acker, D.,Webb, T., Brenzel, A., Lorenz, D.J., Young, A., Thompson, R. History, injury, and psychosocial risk factor commonalities among cases of fatal and near-fatal physical child abuse. Child Abuse and Neglect. 2017 May 10;69:263-277. doi: 10.1016/j.chiabu.2017.04.033. PMID: 28500923
  4. Alver, S.K., Lorenz, D.J., Marvin, M.R., Brock, G.N. Comparison of two equivalent MELD scores for hepatocellular carcinoma patients using data from the United Network for Organ Sharing liver transplant waiting list registry. Transplant International. DOI: 10.1111/tri.12967. PMID: 28403575.
  5. Alver, S.K., Lorenz, D.J., Marvin, M.R., Brock, G.N. Projected outcomes of six-month delay in exception points vs. an equivalent MELD score for HCC liver transplant candidates. Liver Transplantation. 2016 Oct; 22(10):1343-55. DOI: 10.1002/lt.24503. PMID: 27343202.
  6. Harkema, S.J., Shogren, C., Ardolino, E., Lorenz, D.J.. Assessment of functional improvement without compensation for human spinal cord injury: extending the Neuromuscular Recovery Scale to the upper extremities. Journal of Neurotrauma. 2016 Dec 15;33(24):2181-2190. DOI: 10.1089/neu.2015.4213. PMID: 27071494
  7. Thompson, R., Kaczor, K., Lorenz, D.J., Bennett, B.L., Meyers, G., Pierce, M.C. Is the Use of Physical Discipline
    Associated with Aggressive Behaviors in Young Children? Acad Pediatr. 2017 Jan - Feb;17(1):34-44. DOI: 10.1016/j.acap.2016.02.014. PMID: 26924534
  8. Pierce, M.C., Magana, J.N., Kaczor, K., Lorenz, D.J., Meyers, G., Bennett, B.L., Kanegaye, J.T. The Prevalence of Bruising Among Infants in Pediatric Emergency Departments. Annals Emerg Med. 2016. 67: 1-8. DOI: 10.1016/j.annemergmed.2015.06.021. PMID: 26233923.
  9. Tester, N.J., Lorenz, D.J., Suter, S.P., Beuhner, J., Falanga, D., Watson, E., Velozo C.A., Behrman A.L., Basso M. Responsiveness of the Neuromuscular Recovery Scale during Outpatient Activity-Dependent Rehabilitation for Spinal Cord Injury. Neurorehabilitation and Neural Repair. 2016; 30(27): 528-538. DOI: 10.1177/1545968315605181. PMID: 26359344
  10. Behrman, A.L., Velozo, C., Suter, S., Lorenz, D., Basso, D.M. Test-retest reliability of the Neuromuscular Recovery Scale. Arch Phys Med Rehabil. 2015;96:1375-84. DOI: 10.1016/j.apmr.2015.03.022. PMID: 25883038
  11. Basso, D.M., Velozo, C., Lorenz, D., Suter, S., Behrman, A.L. Interrater reliability of theNeuromuscular Recovery Scale for spinal cord injury. Arch Phys Med Rehabil. 2015;96:1397-403. DOI: 10.1016/j.apmr.2014.11.026. PMID: 25546720
  12. Velozo, C., Moorhouse, M., Ardolino, E., Lorenz, D., Suter, S., Basso, D.M., Behrman, A.L. Validity of the Neuromuscular Recovery Scale: A measurement model approach. Arch Phys Med Rehabil. 2015;96:1385-96. DOI: 10.1016/j.apmr.2015.04.004. PMID: 25912666
  13. Khudhair, M., Melloy, P., Lorenz, D.J., Obanor, F., Aitken, E., Datta, S., Luck, J., Fitzgerald, G., and Chakraborty, S. Fusarium crown rot under continuous cropping of susceptible and partially resistant wheat in microcosms at elevated CO2. Plant Pathology. 2014; 63(5): 1033-1043. DOI: 10.1111/ppa.12182
  14. Forrest, G.F., Hutchinson, K.J., Lorenz, D.J., VanHiel, L., Basso, M., Sisto, S.A. Are the 10 Meter and 6 Minute Walk Tests Redundant in Patients with Spinal Cord injury? PLOS One. 2014; 9(5):e94108. DOI: 10.1371/journal.pone.0094108. PMID: 24788068.
  15. Helm, C.W., Lorenz, D.J., Meyer, N.J., Rising, W.R., Wilff, J.L. Retinoids for preventing the progression of cervical intra-epithelial neoplasia. Cochrane Database Syst Rev, 2013 Jun 6; (6):CD003296. DOI:10.1002/14651858.CD003296.pub3. PMID: 23740788
  16. Hymel, K.P., Wilson, D.F., Boos, S.C., Pullin, D.A., Homa, K., Lorenz, D.J., Herman, B.E., Graf, J.M., Isaac, R., Narang, S.K., Armijo-Garcia, V. Derivation of a clinical prediction rule for pediatric abusive head trauma. Pediatr Crit Care Med. 2013 Feb;14(2):210-20. DOI: 10.1097/PCC.0b013e3182712b09. PMID: 23314183.
  17. Lorenz, D.J., Datta, S., Harkema, S.J. Longitudinal patterns of functional recovery in patients with incomplete spinal cord injury receiving activity-based rehabilitation. Arch Phys Med Rehabil. Sep. 2012; 93(9): 1541-1552. DOI: 10.1016/j.apmr.2012.01.027. PMID: 22920451.
  18. Datta, S., Lorenz, D.J, Harkema, S.J. A dynamic longitudinal evaluation of the utility of the Berg Balance Scale in patients with motor incomplete spinal cord injury. Arch Phys Med Rehabil. Sep. 2012; 93(9): 1565-1573. DOI: 10.1016/j.apmr.2012.01.026. PMID: 22920453.
  19. Forrest, G.F., Lorenz, D.J., Hutchinson, K., Van Hiel, L., Basso, D.M., Datta, S., Sisto, S.A., Harkema, S.J. Ambulation and balance outcomes measure different aspects of recovery in individuals with chronic incomplete spinal cord injury. Arch Phys Med Rehabil. Sep. 2012; 93(9): 1553-1564. DOI: 10.1016/j.apmr.2011.08.051.PMID: 22920452.
  20. Behrman, A.L., Ardolino, E., VanHiel, L., Kern, M., Arkinson, D., Lorenz, D., Harkema, S. Assessment of functional improvement without compensation reduces variability of outcome measures after human spinal cord injury. Arch Phys Med Rehabil. Sep. 2012; 93(9): 1518-1529. DOI: 10.1016/j.apmr.2011.04.027. PMID:22920449.
  21. Harkema, S.J., Schmidt-Read, M., Lorenz, D., Edgerton, V.R., Behrman, A. Balance and ambulation improvements
    in individuals with chronic incomplete spinal cord injury using locomotor training-based rehabilitation. Arch Phys Med Rehabil. Sep. 2012; 93(9): 1508-1517. DOI: 10.1016/j.apmr.2011.01.024. PMID:21777905.
  22. Sisto, S.A., Lorenz, D., Hutchinson, K., Wenzel, L., Harkema, S., Krassioukov, A. Cardiovascular status of individuals with incomplete spinal cord injury from 7 Neurorecovery Network rehabilitation centers. Arch Phys Med Rehabil. Sep. 2012; 93(9): 1578-1587. DOI: 10.1016/j.apmr.2012.04.03. PMID: 22920455.
  23. Newton, T.L., Fernandez-Botran, R., Miller, J.J., Lorenz, D.J., Burns, V.E., Fleming, K.N. Markers of Inflammation in MidlifeWomen with Intimate Partner Violence Histories. JWomens Health (Larchmt). 2011 Dec;20(12):1871-80. DOI: 10.1089/jwh.2011.2788. PMID: 22044065.
  24. Condra, C.S., Parbhu, D., Lorenz, D., Herr, S.M. Charges and complications associated with the medical evaluation of febrile infants. Pediatr Emerg Care. 2010 Mar; 26(3): 186-91. DOI: 10.1097/PEC.0b013e3181d1e180. PMID: 20179660.
  25. Pierce, M.C., Kaczor, K., Aldridge, S., O’Flynn, J., Lorenz, D.. Bruising Characteristics Discriminate Physical Child Abuse From Accidental Trauma in Young Children. Pediatrics. 2010 Jan; 125(1):67-74. 10.1542/peds.2008-3632. PMID: 19969620.
  26. Padmanabhan, P., Berkenbosch, J.W., Lorenz, D.J., Pierce, M.C. Evaluation of Cerebral Oxygenation during Procedural Sedation in Children using Near Infrared Spectroscopy. Ann Emerg Med. Aug 2009; 54(2). DOI:10.1016/j.annemergmed.2009.02.009. PMID: 19285362.
  27. Datta, S., Lorenz, D.J., Morrison, S., Ardolino, E., Harkema, S.J. A Multivariate Examination of Temporal Changes in Berg Balance Scale Items for Patients with ASIA Impairment Scale C and D Spinal Cord Injuries. Arch Phys Med Rehabili. 2009 Jul; 90(7): 1208-17. DOI: 10.1016/j.apmr.2008.09.577. PMID: 19577035.
  28. Fortu, J.M., Kim, I.K., Cooper, A., Condra, C., Lorenz, D.J., Pierce, M.C. Psychiatric patients in the pediatric emergency department undergoing routine urine toxicology screens for medical clearance: results and use. Pediatr Emerg Care. 2009 Jun; 25(6): 387-92. DOI: 10.1097/PEC.0b013e3181a79305. PMID:19458561.
  29. Spiller, H., Lorenz, D.J.. Trends in Volatile Substance Abuse. J Addict Dis. 2009;28(2):164-70. DOI:10.1080/10550880902772894. PMID: 19340679.
  30. Spiller, H., Lorenz, D.J., Bailey, E.J., Dart, R.C. Epidemiological trends in abuse and misuse of prescription opioids. J Addict Dis. 2009;28(2):130-6. DOI: 10.1080/10550880902772431. PMID: 19340675.
  31. Ruble, L.I., McDuffie, A.S., King, A.S., Lorenz, D.J.. Caregiver responsiveness and social interaction behaviors of young children with autism. Topics in Early Childhood Special Education. Nov 2008; 28: 158-70. DOI:10.1177/0271121408323009.
  32. Warkentine, F., Pierce, M.C., Kim, I.K., Lorenz, D.J., Paul, R.I. The anatomic relationship of femoral vein to femoral artery in euvolemic pediatric patients by ultrasonography: implications for pediatric femoral central venous access. Acad Emerg Med. 2008 May 15; 15(5):426-30. DOI: 10.1111/j.1553-2712.2008.00087.x. PMID:18439197.
  33. Koller, D.M., Myers, A.B., Lorenz, D., Godambe, S.A. Effectiveness of Oxycodone, Ibuprofen, or the Combination in the Initial Management of Orthopedic Injury-Related Pain in Children. Ped Emerg Care. Sep 2007; 23(9). PMID: 17876251.
Honors and Awards

University of Louisville "Top 4" Faculty Favorite, 2013-2014

University of Louisville Faculty Favorite, 2014-2015, 2015-2016, 2016-2017

Elected member, Delta Omega, Beta Pi Chapter

Commonwealth Scholar, Commonwealth Institute of Kentucky

Graduate Dean’s Citation, University of Louisville, 2011, 2002

Hohman Fellowship, Department of Mathematics, University of Louisville, 2006

Professional Service

Editorial Board Member
Annals of Biometrics & Biostatistics (2013 – ), Journal of Medical Statistics and Informatics (2013 – ), International Journal of Statistics and Probability (2012 – )

University of Louisville Journal of Respiratory Infections (2017), The R Journal (2016), Journal of Neurology and Neuromedicine (2016), Journal of Statistical Computation and Simulation (2016), Statistics in Medicine (2015), Journal of Agricultural, Biological, and Environmental Statistics (2015), Pediatrics (2015, 2010), Statistics and Its Interface (2012-2013), Statistics and Probability Letters (2012), BMC Bioinformatics (2012), Bioinformatics (2012), Archives of Physical Medicine and Rehabilitation (2012), Physical Therapy (2012)

Motulsky, H. Intuitive Biostatistics, 4th ed, Oxford Press.

Florida Department of Health, William G. “Bill” Bankhead, Jr., and David Coley Cancer Research Program (Oak Ridge Associated Universities, 2016); Pennsylvania Department of Health, 2008 Non-formula Grants on Autism, Antibiotic Resistance (Oak Ridge Associated Universities, 2014)

University Service
Department of Bioinformatics and Biostatistics
Online MS Program Coordinator (2017 – )
Director, Statistical Consulting Center (2016 – )
Graduate committee (admissions and curriculum, 2012 – )
Student recruitment committee (chair, 2012 – )
Student grievance committee (2011 – )
Curator of department website (2011 – )
Dual Degree coordinator (2011 – )
Faculty hiring committees (2008, 2011, 2013 – )
System backup committee (2004 – 2006)

School of Public Health and Information Science, University of Louisville
MPH Curriculum review committee (2018 – )
Student academic grievance committee (2013 – )
MPH Practicum mentoring committee (2013 – )
MPH Advisory committee (2013 – 2015)
Student affairs advisory council (2011 – 2013)

University of Louisville
Ideas to Action (i2a) Leadership Committee (2014)
Poster judge for Research! Louisville (2013, 2014)

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