5 citations · 5 across the 9 of their papers we have counts for
9 papers
Tree of Concepts: Interpretable Continual Learners in Non-Stationary Clinical Domains
Dongkyu Cho, Xiyue Li, Samrachana Adhikari +1
Continual learning aims to update models under distribution shift without forgetting, yet many high-stakes deployments, such as healthcare, also require interpretability. In practi…
Causal Survival Analysis in Platform Trials with Non-Concurrent Controls
Antonio D'Alessandro, Samrachana Adhikari, Michele Santacatterina
Platform trials allow treatment arms to enter and exit over time while maintaining a shared control arm, yielding concurrent and non-concurrent controls (NCC). Pooling NCC is often…
Modern Causal Inference Approaches to Improve Power for Subgroup Analysis in Randomized Controlled Trials
Antonio D'Alessandro, Jiyu Kim, Samrachana Adhikari +3
Randomized controlled trials (RCTs) often include subgroup analyses to assess whether treatment effects vary across pre-specified patient populations. However, these analyses frequ…
Domain Adaptation Under MNAR Missingness
Tyrel Stokes, Hyungrok Do, Saul Blecker +2
Current domain adaptation methods under missingness shift are restricted to Missing At Random (MAR) missingness mechanisms. However, in many real-world examples, the MAR assumption…
A Bayesian Approach to Estimate Causal Peer Influence Accounting for Latent Network Homophily
Seungha Um, Tracy Sweet, Samrachana Adhikari
Researchers have focused on understanding how individual's behavior is influenced by the behaviors of their peers in observational studies of social networks. Identifying and estim…
Considerations in Bayesian agent-based modeling for the analysis of COVID-19 data
Seungha Um, Samrachana Adhikari
Agent-based model (ABM) has been widely used to study infectious disease transmission by simulating behaviors and interactions of autonomous individuals called agents. In the ABM,…
Nonparametric Bayesian Instrumental Variable Analysis: Evaluating Heterogeneous Effects of Coronary Arterial Access Site Strategies
Samrachana Adhikari, Sherri Rose, Sharon-Lise Normand
Percutaneous coronary interventions (PCIs) are nonsurgical procedures to open blocked blood vessels to the heart, frequently using a catheter to place a stent. The catheter can be…
Regularization and Hierarchical Prior Distributions for Adjustment with Health Care Claims Data: Rethinking Comorbidity Scores
Jacob Spertus, Samrachana Adhikari, Sharon-Lise Normand
Health care claims data refer to information generated from interactions within health systems. They have been used in health services research for decades to assess effectiveness…
High-Dimensional Longitudinal Classification with the Multinomial Fused Lasso
Samrachana Adhikari, Fabrizio Lecci, James T. Becker +4
We study regularized estimation in high-dimensional longitudinal classification problems, using the lasso and fused lasso regularizers. The constructed coefficient estimates are pi…