Search Results for author: Nigam Shah

Found 12 papers, 5 papers with code

A Multi-Center Study on the Adaptability of a Shared Foundation Model for Electronic Health Records

no code implementations20 Nov 2023 Lin Lawrence Guo, Jason Fries, Ethan Steinberg, Scott Lanyon Fleming, Keith Morse, Catherine Aftandilian, Jose Posada, Nigam Shah, Lillian Sung

With continued pretraining on local data, label efficiency substantially improved, such that $FM_{SM}$ required fewer than 1% of training examples to match the fully trained GBM's performance.

Clinfo.ai: An Open-Source Retrieval-Augmented Large Language Model System for Answering Medical Questions using Scientific Literature

no code implementations24 Oct 2023 Alejandro Lozano, Scott L Fleming, Chia-Chun Chiang, Nigam Shah

The quickly-expanding nature of published medical literature makes it challenging for clinicians and researchers to keep up with and summarize recent, relevant findings in a timely manner.

Abstractive Text Summarization Information Retrieval +3

MOTOR: A Time-To-Event Foundation Model For Structured Medical Records

1 code implementation9 Jan 2023 Ethan Steinberg, Jason Fries, Yizhe Xu, Nigam Shah

MOTOR is the first foundation model for medical TTE predictions and we release a 143M parameter pretrained model for research use at [redacted URL].

Transfer Learning

RadFusion: Benchmarking Performance and Fairness for Multimodal Pulmonary Embolism Detection from CT and EHR

no code implementations23 Nov 2021 Yuyin Zhou, Shih-Cheng Huang, Jason Alan Fries, Alaa Youssef, Timothy J. Amrhein, Marcello Chang, Imon Banerjee, Daniel Rubin, Lei Xing, Nigam Shah, Matthew P. Lungren

Despite the routine use of electronic health record (EHR) data by radiologists to contextualize clinical history and inform image interpretation, the majority of deep learning architectures for medical imaging are unimodal, i. e., they only learn features from pixel-level information.

Benchmarking Computed Tomography (CT) +2

Evaluating Treatment Prioritization Rules via Rank-Weighted Average Treatment Effects

1 code implementation15 Nov 2021 Steve Yadlowsky, Scott Fleming, Nigam Shah, Emma Brunskill, Stefan Wager

We propose rank-weighted average treatment effect (RATE) metrics as a simple and general family of metrics for comparing and testing the quality of treatment prioritization rules.

Marketing

A new paradigm for accelerating clinical data science at Stanford Medicine

1 code implementation17 Mar 2020 Somalee Datta, Jose Posada, Garrick Olson, Wencheng Li, Ciaran O'Reilly, Deepa Balraj, Joseph Mesterhazy, Joseph Pallas, Priyamvada Desai, Nigam Shah

The ecosystem is designed to bring the modern data science community to highly sensitive clinical data in a secure and collaborative big data analytics environment with a goal to enable bigger, better and faster science.

The accuracy vs. coverage trade-off in patient-facing diagnosis models

no code implementations11 Dec 2019 Anitha Kannan, Jason Alan Fries, Eric Kramer, Jen Jen Chen, Nigam Shah, Xavier Amatriain

A third of adults in America use the Internet to diagnose medical concerns, and online symptom checkers are increasingly part of this process.

A comparison of methods for model selection when estimating individual treatment effects

3 code implementations14 Apr 2018 Alejandro Schuler, Michael Baiocchi, Robert Tibshirani, Nigam Shah

Instead of relying on a single method, multiple models fit by a diverse set of algorithms should be evaluated against each other using an objective function learned from the validation set.

Model Selection

Synth-Validation: Selecting the Best Causal Inference Method for a Given Dataset

no code implementations31 Oct 2017 Alejandro Schuler, Ken Jung, Robert Tibshirani, Trevor Hastie, Nigam Shah

Using simulations, we show that using synth-validation to select a causal inference method for each study lowers the expected estimation error relative to consistently using any single method.

Causal Inference

Effective Representations of Clinical Notes

no code implementations19 May 2017 Sebastien Dubois, Nathanael Romano, David C. Kale, Nigam Shah, Kenneth Jung

We used the learned representations, along with commonly used bag of words and topic model representations, as features for predictive models of clinical events.

Feature Engineering Transfer Learning

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