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Spencer Lourens

Education

  • Ph.D. in Biostatistics, University of Iowa, Iowa City, IA, May, 2015
  • B.S. in Mathematics, University of Iowa, Iowa City, IA, December, 2009

Contact Information

Department of Biostatistics

Indiana University School of Medicine

410 West 10th Street, Suite 3000

Indianapolis, IN 46202

email: slourens [at] iu.edu

Tel: (317) 274-4273


Dr. Lourens' research interests are in joint modeling of longitudinal and survival data, with special consideration to nonlinear forms for the trajectory of the longitudinal over time, as well as accomodating practical issues that show up often in biomedical studies involving human subjects, such as nonbalanced designs, missing data, and differing visit patterns by subjects. Dr. Lourens also has interest in mixture distributions, specifically studying bias of estimation of model parameters, and machine learning algorithms used for predictive purposes when prediction is the primary aim of analysis.

 

 

Dr. Lourens' collaborative research has mostly involved neurological diseases, such as Huntington Disease, and the study of munitions workers and risk for pulmonary cancers. He is very excited to explore new collaborative opportunities at Indiana University, and welcomes new challenges in this arena.

Methodological Research


1. Kim, EY, Lourens, S, Long, JD, Paulsen, JS, and Johnson, HJ (2015). Preliminary Analysis Using Multi-atlas Labeling Algorithms for Tracing Longitudinal Change. Accepted by Frontiers in Neuroscience

2. Lourens, S, Zhang, Y, Long, JD, and Paulsen, JS (2014). Analysis of Longitudinal Censored Semicontinuous Data with Application to the Study of Executive Dysfunction: the Towers Task. Accepted by Statistical Methods in Medical Research

3. Lourens, S, Zhang, YJ, Long, JD, and Paulsen, JS (2013). Bias in Estimation of a Mixture of Normal Distributions. Journal of Biometrics and Biostatistics, 31, 245-256

 

Collaborative Research


1. Georgiou-Karistianis, N, Long, JD, Lourens, SG, Stout, JC, Mills, JA, and Paulsen, JS (2014). Movement Sequencing in Huntington Disease. The World Journal of Biological Psychiatry, 15(6), 459-471

2. Bedford, RL, Lourens, SG, Lynch, CF, Smith, BJ, and Field, RW (2014). Utility of Death Certificate Data in Predicting Cancer Incidence. American Journal of Industrial Medicine, 57(2), 153-162

3. Mikulski, MA, Gerke, AK, Lourens, S, Czezok, T, Spring, NL, Laney, AS, and Fourtes, LJ (2013). Agreement Between Fixed-Ratio and Lower Limit of Normal Spirometry Interpretation Protocol Decreases with Age: Is there a Need for a New GOLD Standard? Journal of Occuptation and Environmental Medicine, 55(7), 802-808

4. Papp, KV, Snyder, PJ, Mills, JA, Duff, K, Westervelt, HJ, Long, JD, Lourens, S, and Paulsen, JS (2012). Measuring Executive Dysfunction Longitudinally and in Relation to Genetic Burden, Brain Volumetrics, and Depression in Prodromal Huntington Disease. Archives of Clinical Neuropsychology, 28(2), 156-168

5. Mikulski, M, Hartley, P, Sprince, N, Sanderson, W, Lourens, S, Worden, N, Wang, K, and Fuortes, L (2011). Association between Spirometry Results and ILO Abnormalities in a Cohort of Former Nuclear Weapons Workers. 139th APHA Annual Meeting and Exposition

6. Mikulski, M, Hartley, P, Sprince, N, Delclos, G, Lourens, S, and Fourtes, L (2011). Inter-reader Agreement in ILO Readings and Radiographs for Pneumoconiosis,. 139th APHA Annual Meeting and Exposition

7. Mikulski, MA, Hartley, PG, Sprince, NL, Sanderson, WT, Lourens, S, Worden, NE, Wang, K, and Fuortes, LJ (2011). Risk and Significance of Chest Radiograph and Pulmonary Function Abnormalities in an Elderly Cohort of Former Nuclear Weapons Workers. Journal of Occupational and Environmental Medicine, 53(9), 1046-1053

8. Mikulski, MA, Sanderson, WT, Leonard, SA, Lourens, S, Field, RW, Sprince, NL, and Fuortes, LJ (2011). Prevalence of Beryllium Sensitization among Department of Defense Conventional Munitions Workers at Low Risk for Exposure. Journal of Occupational and Environmental Medicine, 60(7), 569-571

9. Mikulski, MA, Sanderson, WT, Leonard, SA, Lourens, S, Field, RW, Sanderson, W, and Fuortes, L (2010). Health Effects of Exposure to Beryllium in the Manufacture of Conventional Munitions. 138th APHA Annual Meeting and Exposition

 


Teaching

1. Introduction to Biostatistics

2. Mathematical Statistics I and II (Discussion leader for Graduate Students)


Department of Biostatistics | 410 W. Tenth St., Suite 3000 | Indianapolis, IN 46202 | Ph: (317) 274-2661 | Fax: (317) 274-2678