Clinical trials

Appropriate clinical trial designs are essential to the testing of new therapeutics in oncology. New discoveries in cancer biology have shifted some focus away from chemotherapeutic drugs and toward biomarker-targeted treatments and immunotherapies. As a result, novel statistical approaches are needed.

Selected publications

Zabor, E. C., Kane, M. J., Roychoudhury, S., Nie, L., & Hobss, B. P. (Under review). Bayesian Basket Trial Design with False Discovery Rate Control.

Zabor, E. C., Kaizer, A. M., & Hobbs, B. P. (2020). Randomized Controlled Trials. Chest, 158(1s), S79-s87. doi:10.1016/j.chest.2020.03.013

Zabor, E. C., Heller, G., Schwartz, L. H., & Chapman, P. B. (2016). Correlating Surrogate Endpoints with Overall Survival at the Individual Patient Level in BRAFV600E-Mutated Metastatic Melanoma Patients Treated with Vemurafenib. Clin Cancer Res, 22(6), 1341-1347. doi:10.1158/1078-0432.ccr-15-1441

Observational studies

In a hospital setting it is natural to take advantage of the large quantities of data available through electronic health records to conduct retrospective data analyses. Careful thought is needed when applying statistical methods to ensure accurate and interpretable results.

Selected publications

Zabor, E. C., Coit, D., Gershenwald, J. E., McMasters, K. M., Michaelson, J. S., Stromberg, A. J., & Panageas, K. S. (2018). Variability in Predictions from Online Tools: A Demonstration Using Internet-Based Melanoma Predictors. Ann Surg Oncol, 25(8), 2172-2177. doi:10.1245/s10434-018-6370-4

Zabor, E. C., Gonen, M., Chapman, P. B., & Panageas, K. S. (2013). Dynamic prognostication using conditional survival estimates. Cancer, 119(20), 3589-3592. doi:10.1002/cncr.28273

Etiologic heterogeneity

My dissertation research, under the advisement of Dr. Shuang Wang at Columbia University and Dr. Colin Begg at Memorial Sloan Kettering Cancer Center, focused on statistical methods for the study of etiologic heterogeneity. The first part of my research focused on comparing and contrasting existing methods for the study of etiologic heterogeneity using a simulation study and simplified data example. Next, I examined the statistical properties of our method for the study of etiologic heterogeneity to determine its ability to find the truly most etiologically heterogeneous subtype solutions under a variety of data settings. Finally, I applied the method to data from the Carolina Breast Cancer Study, and explored additional methodological challenges that exist in a real data analysis.

Selected publications

The below publications represent my work to date on the topic of statistical methods for the study of etiologic heterogeneity:

Benefield, H. C., Zabor, E. C., Shan, Y., Allott, E. H., Begg, C. B., & Troester, M. A. (2019). Evidence for Etiologic Subtypes of Breast Cancer in the Carolina Breast Cancer Study. Cancer Epidemiol Biomarkers Prev, 28(11), 1784-1791.

Zabor, E. C. (2019). riskclustr: Functions to Study Etiologic Heterogeneity. Journal of Open Source Software, 4(35): 1269.

Zabor, E. C., & Begg, C. B. (2017). A comparison of statistical methods for the study of etiologic heterogeneity. Stat Med, 36(25), 4050-4060.

Mauguen, A., Zabor, E. C., Thomas, N. E., Berwick, M., Seshan, V. E., & Begg, C. B.(2017). Defining Cancer Subtypes With Distinctive Etiologic Profiles: An Application to the Epidemiology of Melanoma. J Am Stat Assoc, 112(517), 54-63.

Begg, C. B., Rice, M. S., Zabor, E. C., & Tworoger, S. S. (2017). Examining the common aetiology of serous ovarian cancers and basal-like breast cancers using double primaries. Br J Cancer.

Begg, C. B., Orlow, I., Zabor, E. C., Arora, A., Sharma, A., Seshan, V. E., Bernstein, J. L. (2015). Identifying Etiologically Distinct Sub-Types of Cancer: A Demonstration Project Involving Breast Cancer. Cancer Med, 4(9), 1432-1439.

Begg, C. B., Seshan, V. E., Zabor, E. C., Furberg, H., Arora, A., Shen, R., . . . Hsieh, J. J. (2014). Genomic investigation of etiologic heterogeneity: methodologic challenges. BMC Med Res Methodol, 14, 138.

Begg, C. B., Zabor, E. C., Bernstein, J. L., Bernstein, L., Press, M. F., Seshan, V. E. (2013). A conceptual and methodological framework for investigating etiologic heterogeneity. Stat Med, 32(29), 5039-5052.