no code implementations • 23 Jul 2022 • Zepeng Huo, Xiaoning Qian, Shuai Huang, Zhangyang Wang, Bobak J. Mortazavi
Medical events of interest, such as mortality, often happen at a low rate in electronic medical records, as most admitted patients survive.
2 code implementations • 23 Jul 2022 • Gregory Holste, Evangelos K. Oikonomou, Bobak J. Mortazavi, Zhangyang Wang, Rohan Khera
Advances in self-supervised learning (SSL) have shown that self-supervised pretraining on medical imaging data can provide a strong initialization for downstream supervised classification and segmentation.
no code implementations • 23 Jun 2022 • Zepeng Huo, Bobak J. Mortazavi, Theodora Chaspari, Nicolaas Deutz, Laura Ruebush, Ricardo Gutierrez-Osuna
We built a multitask neural network to estimate the macronutrient composition from the CGM signal, and compared it against a baseline linear regression.
no code implementations • Nature Communications 2022 • Veer Sangha, Bobak J. Mortazavi, Adrian D. Haimovich, Antônio H. Ribeiro, Cynthia A. Brandt, Daniel L. Jacoby, Wade L. Schulz, Harlan M. Krumholz, Antonio Luiz P. Ribeiro & Rohan Khera
The application of artificial intelligence (AI) for automated diagnosis of electrocardiograms (ECGs) can improve care in remote settings but is limited by the reliance on infrequently available signal-based data.
no code implementations • 11 Jan 2022 • Jonathan Martinez, Kaan Sel, Bobak J. Mortazavi, Roozbeh Jafari
Goal: To achieve-high quality comprehensive feature extraction from physiological signals that enables precise physiological parameter estimation despite evolving waveform morphologies.
no code implementations • 17 Oct 2021 • Zhale Nowroozilarki, Arash Pakbin, James Royalty, Donald K. K. Lee, Bobak J. Mortazavi
Electronic Health Record (EHR) systems provide critical, rich and valuable information at high frequency.
1 code implementation • 23 Mar 2021 • Arash Pakbin, Xiaochen Wang, Bobak J. Mortazavi, Donald K. K. Lee
Modern applications of survival analysis increasingly involve time-dependent covariates.
1 code implementation • 25 Jul 2020 • Justin Lovelace, Nathan C. Hurley, Adrian D. Haimovich, Bobak J. Mortazavi
We identify risk factors for both readmission and mortality outcomes and demonstrate that our framework can be used to develop dynamic problem lists that present clinical problems along with their quantitative importance.
1 code implementation • 24 Jul 2020 • Lida Zhang, Nathan C. Hurley, Bassem Ibrahim, Erica Spatz, Harlan M. Krumholz, Roozbeh Jafari, Bobak J. Mortazavi
A practical problem with this approach is that the amount of data required to confidently train such a regression model can be prohibitive.
1 code implementation • ICML 2020 • Xiaochen Wang, Arash Pakbin, Bobak J. Mortazavi, Hongyu Zhao, Donald K. K. Lee
BoXHED 1. 0 is a novel tree-based implementation of the generic estimator proposed in Lee, Chen, Ishwaran (2017), which was designed for handling time-dependent covariates in a fully nonparametric manner.
1 code implementation • 30 Oct 2019 • Justin R. Lovelace, Nathan C. Hurley, Adrian D. Haimovich, Bobak J. Mortazavi
Clinical notes contain a large amount of clinically valuable information that is ignored in many clinical decision support systems due to the difficulty that comes with mining that information.
no code implementations • 12 Aug 2019 • Nathan C. Hurley, Erica S. Spatz, Harlan M. Krumholz, Roozbeh Jafari, Bobak J. Mortazavi
We highlight three primary needs in the design of new smart health technologies: 1) the need for sensing technology that can track longitudinal trends in signs and symptoms of the cardiovascular disorder despite potentially infrequent, noisy, or missing data measurements; 2) the need for new analytic techniques that model data captured in a longitudinal, continual fashion to aid in the development of new risk prediction techniques and in tracking disease progression; and 3) the need for machine learning techniques that are personalized and interpretable, allowing for advancements in shared clinical decision making.
1 code implementation • 5 Jul 2019 • Nathan C. Hurley, Adrian D. Haimovich, R. Andrew Taylor, Bobak J. Mortazavi
In the five chief complaints, we find between 2 and 6 clusters, with the peak mean pairwise ARI between subsequent training iterations to range from 0. 35 to 0. 74.