2 citations · 3 across the 6 of their papers we have counts for
8 papers
Prediction Modeling from an EHR-Derived Allostatic Load Index with Informatively Missing Biomarkers: A Case Study
Grayson E. Weavil, Joseph Rigdon, Sarah C. Lotspeich
Embedding a standardized measure of physiologic stress in electronic health records (EHR) could be instrumental to preventative care. The allostatic load index (ALI), calculated fr…
Correcting for Missing Data When Evaluating Surrogate Markers in a Clinical Trial
Sarah C. Lotspeich, P. D. Anh. Nguyen, Layla Parast
Evaluating treatment effects is critical in clinical trials but sometimes involves lengthy, invasive, or costly follow-up procedures. In these cases, surrogate markers, which provi…
Symmetric Vaccine Efficacy
Lucy D'Agostino McGowan, Sarah C. Lotspeich, Michael G. Hudgens
Traditional measures of vaccine efficacy (VE) are inherently asymmetric, constrained above by but unbounded below. As a result, VE estimates and corresponding confidence interv…
Two-phase validation sampling via principal components to improve efficiency in multi-model estimation from error-prone biomedical databases
Sarah C. Lotspeich, Cole Manschot
Two-phase sampling offers a cost-effective way to validate error-prone covariate measurements in biomedical databases. Inexpensive or easy-to-obtain information is collected for th…
On Using Large Language Models to Enhance Clinically-Driven Missing Data Recovery Algorithms in Electronic Health Records
Sarah C. Lotspeich, Abbey Collins, Brian J. Wells +3
Objective: Electronic health records (EHR) data are prone to missingness and errors. Previously, we devised an "enriched" chart review protocol where a "roadmap" of auxiliary diagn…
Linking Potentially Misclassified Healthy Food Access to Diabetes Prevalence
Ashley E. Mullan, P. D. Anh Nguyen, Sarah C. Lotspeich
Access to healthy food is key to maintaining a healthy lifestyle and can be quantified by the distance to the nearest grocery store. However, calculating this distance forces a tra…
Overcoming data challenges through enriched validation and targeted sampling to measure whole-person health in electronic health records
Sarah C. Lotspeich, Sheetal Kedar, Rabeya Tahir +7
The allostatic load index (ALI) is a 10-component measure of whole-person health. Data from electronic health records (EHR) present a huge opportunity to operationalize the ALI in…
Combining straight-line and map-based distances to investigate the connection between proximity to healthy foods and disease
Sarah C. Lotspeich, Ashley E. Mullan, Lucy D'Agostino McGowan +1
Healthy foods are essential for a healthy life, but accessing healthy food can be more challenging for some people than others. This disparity in food access may lead to disparitie…