TimeAlign Plugin: Exploratory Visual Analysis of Temporal Events
Contributed by the Human-Computer Interaction Lab at the University of Maryland, College Park
Description
The TimeAlign plugin for i2b2 is a visual analysis tool for temporal categorical data from multiple patient records. It visualizes multiple patients' medical history. Each history contains a set of relevant categorical events (ex. diagnosis, prescription, intervention, room change, admission, discharge, etc). TimeAlign displays the records and their events in a linear, zoomable timeline that allows investigators to quickly grasp the temporal relationships of important events.
TimeAlign lets investigators explore the data via its simple but powerful interaction mechanisms. At the heart is the Align-Rank-Filter (ARF) framework. Investigators can align all patients by some important first occurrence of an event and discover how other events are related to it. For example, by aligning patients by their first heparin injection, investigators can examine if the event of low-platelet reading occur more frequently as a potential signal for thrombocytopenia. Ranking, for example, can reorder patients by the number of low-platelet reading events from highest to lowest. Finally, filtering lets investigators to narrow down patient population by event characteristics: show me only patients with at least three exposures of heparin (filter by event count), or show me patients who had never had a surgical procedure followed by heparin exposure followed by low-platelet count (filter by event ordering).
Download and Setup
Quick Start
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