Lacey Etzkorn, Ph.D.

Public Health, Data Science, Biostatistics

I am a postdoctoral fellow with the Epidemiology and Biostatistics of Aging Training Program, where I work with Dr. Jennifer Schrack and the ENGAGE group on development of methods for analyzing data from wearable sensors in aging populations.

I recently received my PhD in Biostatistics from the Johns Hopkins Bloomberg School of Public Health , under the guidance of Ciprian Crainiceanu and the WIT research group.

As an undergraduate at St. Olaf College , I studied Math, Statistics, and Environmental Studies. I was a fellow in the Center for Interdisciplinary Research , I assisted with research at the Cannon River Watershed Partnership (now called Clean River Partners ), and I was a junior fellow at the Joint Program in Survey Methodology when I assisted with questionnaire design at the National Agrigultural Statistics Service.

Public Health (Under Construction)

During my Ph.D., I collaborated with clinicians in the Multicenter AIDS Cohort Study to better understand differences in physical activity and heart health between men living with and without HIV.

Data Science (Under Construction)

I work on posture classification with chest-worn accelerometers, often embedded in ECG patches, as a means to contextualize cardiac activity.

Check out some interactive plots I made here here.

I am currently working on an R package with a vignette which I will link here in the coming months, but for now I will just leave you with an interactive plotly graphic that shows the kind of data stucture we use for classifying posture.

Biostatistics (Under Construction)

I was introduced to the world of correlated data very early on. As an undergraduate at Saint Olaf College, I got to be a part of an innovative course designed by Paul Roback and Julie Legler.

For three years during graduate school, I worked with Elizabeth Colantuoni and Scott Zeger as TA for the JHSPH combined series of Longitudinal Data Analysis and Multilevel Models. As a part of my dissertation research, I am working with Dr. Colantuoni on developing new functions within frailtypack for the joint modelling of multiple recurrent event and survival outcomes. We think these kinds of models will be important for clinical trials conducted within Intensive Care Units (ICUs).

My life

I grew up in Webster Groves, Missouri. I love crafts, my pets, and playing board games.