About the "CARE - Concept Demographics Histograms" Web Client Plugin



This plugin is part of the CARE (Cohort Analysis & Refinement Expeditors) Tool Set developed as a result of feedback and suggestions from the i2b2 users community in the University of Massachusetts Medical School. As its name implies, the purpose of this tool set is to facilitate and expedite the analysis of the cohorts (i.e. a subset of a patient set) and therefore hopefully the refined usage of those particular cohorts in a study.

This plugin provides the following main functions:



  1. Navigate to the "Specify Data" tab. Drag and drop a Patient Set and one or more concepts (ontology terms) onto the appropriate input boxes:## Enter appropriate values in the 'Starting Patient' and 'Number of Patients' fields that are then presented, to specify the subset of the patient set to use. Also specify at the 'Query Subgroup Size' field the size of smaller queries of subgroups of patients to be used iteratively, to facilitate reducing the risks of overwhelming the server (i2b2 hive).## Click on the corresponding 'HELP' hotlinks next to the 'Starting Patient' and 'Number of Patients' fields, and the'HELP' hotlink next to the 'Query Subgroup Size' field, for detailed information; and enter corresponding appropriate values.## Click on the corresponding 'HINT' hotlink below the 'Concepts' field for hint or suggestion for selecting concepts.
  2. Finally, select the "View Results" tab to wait for and view the generated demographic histograms.


Browser Compatibilities


i2b2 version compatibilities

This current version is compatible with i2b2 v.1.3-1.7.

Version History


Initial release, with options of using a subset of a large patient set; user-friendly feedback (estimated run-time, etc.), helps & hints..
By Wayne Chan, University of Massachusetts Medical School, Worcester, USA.

2015 Q1


Terms of Use

This plugin is published under the GNU GPL v3 license

This software is distributed as a plugin to the i2b2 v1.3-1.7 webclient framework, and may be used free of charge. It is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.


The latest version of this web client plugins can be downloaded from TBD..