Evaluating interventions in clinical care and health informatics through a mix of designs: implementation and comparative-effectiveness RCTs where feasible, and target trial emulations in large-scale health-record data where a trial is not.
Jan 1, 2026Testing whether prenatal lead exposure is associated with preterm birth, and whether maternal micronutrient adequacy and community-level social vulnerability modify that association, using ECHO program cohort data.
Jun 1, 2025Comparing how much patient-reported social determinants in the EHR add to Census-linked socioeconomic measures for predicting glycemic control, in a UNC Health type 2 diabetes cohort.
Jan 1, 2024Developing the EHR Density Index (EDI), a covariate that quantifies how much a patient's documentation deviates from clinically similar patients, so EHR studies can adjust for documentation-density bias. Developed and validated on ~25,000 UNC Health patients.
Jan 1, 2024Using longitudinal patient address histories in EHRs as a population-scale measure of residential mobility, and what it reveals about spatial health inequity.
Jan 1, 2024Linking spatially resolved sea-level-rise and flood exposure to longitudinal residential histories from a consumer-credit panel, to estimate how coastal inundation risk relates to household out-migration in North Carolina.
Jan 1, 2024A method for rolling granular OMOP clinical concepts up into interpretable, TF-IDF-weighted groups, to make high-dimensional EHR data more tractable for phenotyping and analysis.
Jan 1, 2023I emulate target trials in large-scale, geocoded EHR data to estimate the effects of private well-water arsenic exposure on bladder cancer and type 2 diabetes.
Jan 1, 2023Research in the National COVID Cohort Collaborative (N3C) and NIH RECOVER, using harmonized multi-site EHR data to study Long COVID: machine-learning phenotypes, ICD-10 characterization, and target trial emulations of antiviral treatment.
Aug 16, 2021A research initiative on data and methods for equitable crisis response; I worked on serosurveillance methods, including how geographically skewed recruitment biases COVID-19 seroprevalence estimates.
Aug 1, 2020A multi-institution network using aggregated, privacy-preserving mobility data to track population movement and inform COVID-19 response planning.
Mar 16, 2020Analyzing COVID-19 testing data across India with the Swasth Community Science Alliance, to support a hyper-local, evidence-based pandemic response — from optimizing test allocation to epidemiological patterns in large-scale national test results.
Jan 1, 2020An analysis of the International Organization for Migration's Flow Monitoring Survey data on migration across West and Central Africa, and the role of digital technology in transnational migration.
Jan 1, 2020A field assessment of the health and displacement consequences of the 2018 Kerala floods, conducted with the Government of Kerala and the All India Disaster Mitigation Institute.
Aug 28, 2019A rapid-assessment household survey of Rohingya refugees and host families in Cox's Bazar, Bangladesh, documenting health and displacement needs.
Jul 1, 2018A Harvard research-and-policy collaborative on interoperable digital health systems for India; I worked on human-centered design for mHealth tools and on digital-health regulatory frameworks.
Aug 1, 2017Documenting the effects of the Syrian conflict on population morbidity and mortality, as part of the Lancet Commission on Syria.
Aug 1, 2017Community-based studies of child oral health and undernutrition in El Salvador and India, linking infant feeding and dietary practices to severe tooth decay and malnutrition in young children.
Jan 1, 2012
