Xu Shi

TL;DR: This study finds post CO VID-19 condition prevalence is substantial; the health effects of COVID-19 appear to be prolonged and can exert stress on the healthcare system.

TL;DR: Among older adults with a new primary care visit for back pain, early imaging was not associated with better 1-year outcomes, and the value of early diagnostic imaging in older adults forBack pain without radiculopathy is uncertain.

TL;DR: This article demonstrates how an insurance claims database of 60 million members, a collection of clinical notes, and 1.7 million full text biomedical journal articles can be combined to embed concepts into a common space, resulting in the largest ever set of embeddings for 108,477 medical concepts.

TL;DR: A formal potential outcome framework for proximal causal learning is introduced, which while explicitly acknowledging covariate measurements as imperfect proxies of confounding mechanisms, offers an opportunity to learn about causal effects in settings where exchangeability on the basis of measured covariates fails.

TL;DR: This work establishes non-parametric identification of the ATE under weaker conditions in the case of categorical unmeasured confounding and negative control variables, and provides a general semiparametric framework for obtaining inferences about the AtE while leveraging information about a possibly large number of measured covariates.