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Rodney Sparapani PhD

Rodney Sparapani PhD

Assistant Professor

Institution: Medical College of Wisconsin
Department: Institute for Health and Equity
Division: Biostatistics
Program: Research

Member of the Cancer Center
Member of the Cardiovascular Center
Member of the Center for Advancing Population Science (CAPS)


I am willing to collaborate on research projects.


Research Experience

  • Administrative Claims, Healthcare
  • Clinical Trials Data Monitoring Committees
  • Electronic Health Records
  • Observational Study
  • Randomized Controlled Trial
  • Methodologies and Techniques

  • Bayes Theorem
  • Biostatistics
  • Causality
  • Machine Learning
  • Mathematical Computing
  • Medical Informatics
  • Monte Carlo Method
  • Statistics, Nonparametric
  • Survival Analysis
  • Bayesian Analysis
  • MCW Program / Core Facilities

  • Research Computing Center Faculty Advisory Committee
  • Educational Expertise

  • Education, Graduate
  • Teaching Biostatistics
  • Publications (47)

  • Fully Nonparametric Bayesian Additive Regression Trees (George E, Laud P, Logan B, McCulloch R, Sparapani R) Advances in Econometrics (in press) 01/01/2020    
  • Nonparametric machine learning and efficient computation with Bayesian Additive Regression Trees: the BART R package (Sparapani R, Spanbuer C, McCulloch R) Journal of Statistical Software (in press) 10/02/2019    
  • Detection of Left Ventricular Hypertrophy Using Bayesian Additive Regression Trees: The MESA. (Sparapani R, Dabbouseh NM, Gutterman D, Zhang J, Chen H, Bluemke DA, Lima JAC, Burke GL, Soliman EZ) J Am Heart Assoc 2019 Mar 05;8(5):e009959 PMID: 30827132 PMCID: PMC6474924 SCOPUS ID: 2-s2.0-85062384504 03/05/2019    
  • Nonparametric competing risks analysis using Bayesian Additive Regression Trees. (Sparapani R, Logan BR, McCulloch RE, Laud PW) Stat Methods Med Res 2019 Jan 07:962280218822140 PMID: 30612519 01/08/2019    
  • Non-parametric recurrent events analysis with BART and an application to the hospital admissions of patients with diabetes. (Sparapani RA, Rein LE, Tarima SS, Jackson TA, Meurer JR) Biostatistics 2018 Jul 28 PMID: 30059992 07/31/2018    
  • Variations in 30-day readmissions and length of stay among spine surgeons: a national study of elective spine surgery among US Medicare beneficiaries. (Singh S, Sparapani R, Wang MC) J Neurosurg Spine 2018 Sep;29(3):286-291 PMID: 29856308 SCOPUS ID: 2-s2.0-85052759343 06/02/2018    
  • Signs of residuals for testing coefficients in quantile regression (Tarima S, Tarassenko P, Tuyishimire B, Sparapani R, Rein L, Meurer J) Springer Proceedings in Mathematics and Statistics 2018;231:219-230 SCOPUS ID: 2-s2.0-85047893289 01/01/2018    
  • Decision making and uncertainty quantification for individualized treatments using Bayesian Additive Regression Trees. (Logan BR, Sparapani R, McCulloch RE, Laud PW) Stat Methods Med Res 2019 Apr;28(4):1079-1093 PMID: 29254443 PMCID: PMC6028324 SCOPUS ID: 2-s2.0-85043704690 12/20/2017       2 Citations
  • Prevalence and Consequences of Axillary Lymph Node Dissection in the Era of Sentinel Lymph Node Biopsy for Breast Cancer. (Yen TWF, Laud PW, Pezzin LE, McGinley EL, Wozniak E, Sparapani R, Nattinger AB) Med Care 2018 01;56(1):78-84 PMID: 29087982 PMCID: PMC5725235 SCOPUS ID: 2-s2.0-85032966060 11/01/2017       2 Citations
  • Electrocardiographic Strain Pattern Is Associated With Left Ventricular Concentric Remodeling, Scar, and Mortality Over 10 Years: The Multi-Ethnic Study of Atherosclerosis. (Inoue YY, Soliman EZ, Yoneyama K, Ambale-Venkatesh B, Wu CO, Sparapani R, Bluemke DA, Lima JAC, Ashikaga H) J Am Heart Assoc 2017 Sep 20;6(9) PMID: 28931529 PMCID: PMC5634304 SCOPUS ID: 2-s2.0-85029744606 09/22/2017       1 Citation
  • Aortic stiffening precedes onset of heart failure with preserved ejection fraction in patients with asymptomatic diastolic dysfunction. (Karagodin I, Aba-Omer O, Sparapani R, Strande JL) BMC Cardiovasc Disord 2017 02 14;17(1):62 PMID: 28196483 PMCID: PMC5310057 SCOPUS ID: 2-s2.0-85012907344 02/16/2017       4 Citations
  • Contribution of K1.5 Channel to Hydrogen Peroxide-Induced Human Arteriolar Dilation and Its Modulation by Coronary Artery Disease. (Nishijima Y, Cao S, Chabowski DS, Korishettar A, Ge A, Zheng X, Sparapani R, Gutterman DD, Zhang DX) Circ Res 2017 Feb 17;120(4):658-669 PMID: 27872049 PMCID: PMC5315616 SCOPUS ID: 2-s2.0-85000399498 11/23/2016       19 Citations
  • Effect of hospital volume on processes of breast cancer care: A National Cancer Data Base study. (Yen TW, Pezzin LE, Li J, Sparapani R, Laud PW, Nattinger AB) Cancer 2017 05 15;123(6):957-966 PMID: 27861746 SCOPUS ID: 2-s2.0-84998953404 11/20/2016       6 Citations
  • The interplay between hospital and surgeon factors and the use of sentinel lymph node biopsy for breast cancer. (Yen TW, Li J, Sparapani RA, Laud PW, Nattinger AB) Medicine (Baltimore) 2016 Aug;95(31):e4392 PMID: 27495053 PMCID: PMC4979807 SCOPUS ID: 2-s2.0-84983372389 08/09/2016       9 Citations
  • Determinants of unhealthy behaviors following bariatric surgery (Rusch M, Adams SJ, Azam L, Sparapani R, Meurer J, Wallace J) Obesity Open Access Obesity Open Access 2016; 2(3): 1-7 07/06/2016    
  • Outcomes of Allogeneic Hematopoietic Cell Transplantation in Children and Young Adults with Chronic Myeloid Leukemia: A CIBMTR Cohort Analysis. (Chaudhury S, Sparapani R, Hu ZH, Nishihori T, Abdel-Azim H, Malone A, Olsson R, Hamadani M, Daly A, Bacher U, Wirk BM, Kamble RT, Gale RP, Wood WA, Hale G, Wiernik PH, Hashmi SK, Marks D, Ustun C, Munker R, Savani BN, Alyea E, Popat U, Sobecks R, Kalaycio M, Maziarz R, Hijiya N, Saber W) Biol Blood Marrow Transplant 2016 06;22(6):1056-1064 PMID: 26964698 PMCID: PMC4877686 SCOPUS ID: 2-s2.0-84963595294 03/12/2016       8 Citations
  • Nonparametric survival analysis using Bayesian Additive Regression Trees (BART). (Sparapani RA, Logan BR, McCulloch RE, Laud PW) Stat Med 2016 07 20;35(16):2741-53 PMID: 26854022 PMCID: PMC4899272 SCOPUS ID: 2-s2.0-84978975552 02/09/2016       15 Citations
  • In Vivo T Cell Depletion with Myeloablative Regimens on Outcomes after Cord Blood Transplantation for Acute Lymphoblastic Leukemia in Children. (Ponce DM, Eapen M, Sparapani R, O'Brien TA, Chan KW, Chen J, Craddock J, Schultz KR, Wagner JE, Perales MA, Barker JN) Biol Blood Marrow Transplant 2015 Dec;21(12):2173-2179 PMID: 26327630 PMCID: PMC4639413 SCOPUS ID: 2-s2.0-84947422775 09/04/2015       11 Citations
  • Cisplatin and etoposide versus carboplatin and paclitaxel with concurrent radiotherapy for stage III non-small-cell lung cancer: an analysis of Veterans Health Administration data. (Santana-Davila R, Devisetty K, Szabo A, Sparapani R, Arce-Lara C, Gore EM, Moran A, Williams CD, Kelley MJ, Whittle J) J Clin Oncol 2015 Feb 20;33(6):567-74 PMID: 25422491 PMCID: PMC4322259 SCOPUS ID: 2-s2.0-84923196894 11/26/2014       52 Citations
  • An algorithm to identify the development of lymphedema after breast cancer treatment. (Yen TW, Laud PW, Sparapani RA, Li J, Nattinger AB) J Cancer Surviv 2015 Jun;9(2):161-71 PMID: 25187004 PMCID: PMC4362809 SCOPUS ID: 2-s2.0-84930009058 09/05/2014       2 Citations
  • Surgeon specialization and use of sentinel lymph node biopsy for breast cancer. (Yen TW, Laud PW, Sparapani RA, Nattinger AB) JAMA Surg 2014 Feb;149(2):185-92 PMID: 24369337 PMCID: PMC4005375 SCOPUS ID: 2-s2.0-84894540668 12/27/2013       18 Citations
  • Thirty-day readmissions after elective spine surgery for degenerative conditions among US Medicare beneficiaries. (Wang MC, Shivakoti M, Sparapani RA, Guo C, Laud PW, Nattinger AB) Spine J 2012 Oct;12(10):902-11 PMID: 23098615 SCOPUS ID: 2-s2.0-84870296222 10/27/2012       84 Citations
  • Socioeconomic and racial differences in treatment for breast cancer at a low-volume hospital. (Kong AL, Yen TW, Pezzin LE, Miao H, Sparapani RA, Laud PW, Nattinger AB) Ann Surg Oncol 2011 Oct;18(11):3220-7 PMID: 21861226 PMCID: PMC3201787 SCOPUS ID: 2-s2.0-83055194541 08/24/2011       14 Citations
  • Fracture risk and adjuvant hormonal therapy among a population-based cohort of older female breast cancer patients. (Neuner JM, Yen TW, Sparapani RA, Laud PW, Nattinger AB) Osteoporos Int 2011 Nov;22(11):2847-55 PMID: 21170643 PMCID: PMC3166362 SCOPUS ID: 2-s2.0-80755163585 12/21/2010       27 Citations
  • Socioeconomic factors associated with adjuvant hormone therapy use in older breast cancer survivors. (Yen TW, Czypinski LK, Sparapani RA, Guo C, Laud PW, Pezzin LE, Nattinger AB) Cancer 2011 Jan 15;117(2):398-405 PMID: 20824718 PMCID: PMC3010527 SCOPUS ID: 2-s2.0-78650995463 09/09/2010       17 Citations
  • Heightened attention to medical privacy: challenges for unbiased sample recruitment and a possible solution. (Nattinger AB, Pezzin LE, Sparapani RA, Neuner JM, King TK, Laud PW) Am J Epidemiol 2010 Sep 15;172(6):637-44 PMID: 20660123 PMCID: PMC3025645 SCOPUS ID: 2-s2.0-77956914255 07/28/2010       23 Citations
  • Elderly breast cancer survivors accurately self-report key treatment information. (Yen TW, Sparapani RA, Guo C, Neuner JM, Laud PW, Nattinger AB) J Am Geriatr Soc 2010 Feb;58(2):410-2 PMID: 20370882 PMCID: PMC2972547 SCOPUS ID: 2-s2.0-75749096916 04/08/2010       9 Citations
  • A contemporary, population-based study of lymphedema risk factors in older women with breast cancer. (Yen TW, Fan X, Sparapani R, Laud PW, Walker AP, Nattinger AB) Ann Surg Oncol 2009 Apr;16(4):979-88 PMID: 19194754 PMCID: PMC2729500 SCOPUS ID: 2-s2.0-62149131066 02/06/2009       57 Citations
  • Exploring the surgeon volume outcome relationship among women with breast cancer. (Nattinger AB, Laud PW, Sparapani RA, Zhang X, Neuner JM, Gilligan MA) Arch Intern Med 2007 Oct 08;167(18):1958-63 PMID: 17923595 SCOPUS ID: 2-s2.0-35348993245 10/10/2007       27 Citations
  • Racial and socioeconomic disparities in bone density testing before and after hip fracture. (Neuner JM, Zhang X, Sparapani R, Laud PW, Nattinger AB) J Gen Intern Med 2007 Sep;22(9):1239-45 PMID: 17594131 PMCID: PMC2219762 SCOPUS ID: 2-s2.0-34547850471 06/28/2007       35 Citations
  • Disparities in colon cancer screening in the Medicare population. (Ananthakrishnan AN, Schellhase KG, Sparapani RA, Laud PW, Neuner JM) Arch Intern Med 2007 Feb 12;167(3):258-64 PMID: 17296881 SCOPUS ID: 2-s2.0-33846984978 02/14/2007       98 Citations
  • Relationship between number of breast cancer operations performed and 5-year survival after treatment for early-stage breast cancer. (Gilligan MA, Neuner J, Zhang X, Sparapani R, Laud PW, Nattinger AB) Am J Public Health 2007 Mar;97(3):539-44 PMID: 17267725 PMCID: PMC1805003 SCOPUS ID: 2-s2.0-33847700092 02/03/2007       42 Citations
  • Surgeon characteristics and variations in treatment for early-stage breast cancer. (Gilligan MA, Neuner J, Sparapani R, Laud PW, Nattinger AB) Arch Surg 2007 Jan;142(1):17-22 PMID: 17224496 SCOPUS ID: 2-s2.0-33846195316 01/17/2007       35 Citations
  • Sex differences in outcomes of sinus surgery. (Mendolia-Loffredo S, Laud PW, Sparapani R, Loehrl TA, Smith TL) Laryngoscope 2006 Jul;116(7):1199-203 PMID: 16826060 SCOPUS ID: 2-s2.0-33747169086 07/11/2006       27 Citations
  • Bone density testing in older women and its association with patient age. (Neuner JM, Binkley N, Sparapani RA, Laud PW, Nattinger AB) J Am Geriatr Soc 2006 Mar;54(3):485-9 PMID: 16551317 SCOPUS ID: 2-s2.0-33644658869 03/23/2006       21 Citations
  • Effect of model of care delivery on mammography use among elderly breast cancer survivors. (Etim AE, Schellhase KG, Sparapani R, Nattinger AB) Breast Cancer Res Treat 2006 Apr;96(3):293-9 PMID: 16538537 SCOPUS ID: 2-s2.0-33645720262 03/16/2006       17 Citations
  • Erratum: Clarification note to an algorithm for the use of medicare claims data to identify women with incident breast cancer (Health Services Research (December 2004) 39, 6, 1 (1733-1750)) (Nattinger AB, Laud PW, Bajorunaite R, Sparapani RA, Freeman JL) Health Services Research February 2006;41(1):302 SCOPUS ID: 2-s2.0-33645230039 02/01/2006    
  • Predictive factors and outcomes in endoscopic sinus surgery for chronic rhinosinusitis. (Smith TL, Mendolia-Loffredo S, Loehrl TA, Sparapani R, Laud PW, Nattinger AB) Laryngoscope 2005 Dec;115(12):2199-205 PMID: 16369166 SCOPUS ID: 2-s2.0-33644805216 12/22/2005       215 Citations
  • An algorithm for the use of Medicare claims data to identify women with incident breast cancer. (Nattinger AB, Laud PW, Bajorunaite R, Sparapani RA, Freeman JL) Health Serv Res 2004 Dec;39(6 Pt 1):1733-49 PMID: 15533184 PMCID: PMC1361095 SCOPUS ID: 2-s2.0-10044233970 11/10/2004       133 Citations
  • Decentralization of breast cancer surgery in the United States. (Neuner JM, Gilligan MA, Sparapani R, Laud PW, Haggstrom D, Nattinger AB) Cancer 2004 Sep 15;101(6):1323-9 PMID: 15368323 SCOPUS ID: 2-s2.0-4444305029 09/16/2004       30 Citations
  • Emacs Speaks Statistics: A Multiplatform, Multipackage Development Environment for Statistical Analysis (Rossini AJ, Heiberger RM, Sparapani RA, Mächler M, Hornik K) Journal of Computational and Graphical Statistics March 2004;13(1):247-261 SCOPUS ID: 2-s2.0-1842486829 03/01/2004    
  • Misreporting of myocardial infarction end points: results of adjudication by a central clinical events committee in the PARAGON-B trial. Second Platelet IIb/IIIa Antagonist for the Reduction of Acute Coronary Syndrome Events in a Global Organization Network Trial. (Mahaffey KW, Roe MT, Dyke CK, Newby LK, Kleiman NS, Connolly P, Berdan LG, Sparapani R, Lee KL, Armstrong PW, Topol EJ, Califf RM, Harrington RA) Am Heart J 2002 Feb;143(2):242-8 PMID: 11835026 SCOPUS ID: 2-s2.0-0036480190 02/09/2002       60 Citations
  • Randomized trial of candesartan cilexetil in the treatment of patients with congestive heart failure and a history of intolerance to angiotensin-converting enzyme inhibitors. (Granger CB, Ertl G, Kuch J, Maggioni AP, McMurray J, Rouleau JL, Stevenson LW, Swedberg K, Young J, Yusuf S, Califf RM, Bart BA, Held P, Michelson EL, Sellers MA, Ohlin G, Sparapani R, Pfeffer MA) Am Heart J 2000 Apr;139(4):609-17 PMID: 10740141 SCOPUS ID: 2-s2.0-0034074905 03/31/2000       98 Citations
  • Comparison of sibrafiban with aspirin for prevention of cardiovascular events after acute coronary syndromes: a randomised trial. The SYMPHONY Investigators. Sibrafiban versus Aspirin to Yield Maximum Protection from Ischemic Heart Events Post-acute Coronary Syndromes. Lancet 2000 Jan 29;355(9201):337-45 PMID: 10665552 02/09/2000       266 Citations
  • Association between minor elevations of creatine kinase-MB level and mortality in patients with acute coronary syndromes without ST-segment elevation. PURSUIT Steering Committee. Platelet Glycoprotein IIb/IIIa in Unstable Angina: Receptor Suppression Using Integrilin Therapy. (Alexander JH, Sparapani RA, Mahaffey KW, Deckers JW, Newby LK, Ohman EM, Corbalán R, Chierchia SL, Boland JB, Simoons ML, Califf RM, Topol EJ, Harrington RA) JAMA 2000 Jan 19;283(3):347-53 PMID: 10647797 SCOPUS ID: 2-s2.0-0034684991 01/27/2000       100 Citations
  • Clinical significance of thrombocytopenia during a non-ST-elevation acute coronary syndrome. The platelet glycoprotein IIb/IIIa in unstable angina: receptor suppression using integrilin therapy (PURSUIT) trial experience. (McClure MW, Berkowitz SD, Sparapani R, Tuttle R, Kleiman NS, Berdan LG, Lincoff AM, Deckers J, Diaz R, Karsch KR, Gretler D, Kitt M, Simoons M, Topol EJ, Califf RM, Harrington RA) Circulation 1999 Jun 08;99(22):2892-900 PMID: 10359733 SCOPUS ID: 2-s2.0-0033536018 06/09/1999       132 Citations
  • Inhibition of platelet glycoprotein IIb/IIIa with eptifibatide in patients with acute coronary syndromes. (Platelet Glycoprotein IIb/IIIa in Unstable Angina: Receptor Suppression Using Integrilin Therapy (PURSUIT) Trial Investigators) N Engl J Med 1998 08 13;339(7):436-43 PMID: 9705684 08/15/1998       1589 Citations
  • Last update: 10/03/2019
    jenkins-FCD Prod-388 89e904233d719332173309c68ab82b0b2a78a3a7