[Corpora-List] Second Call for Participation

Ozlem Uzuner ozlem at mit.edu
Fri Feb 15 15:08:15 CET 2008

Announcement of Data Release and Second Call for Participation

Second i2b2 Shared-Task and Workshop

Challenges in Natural Language Processing for Clinical Data

Obesity Challenge (A Shared-Task on Obesity): Who's obese and what

co-morbidities do they (definitely/likely) have?

Data Release: 15 March, 2008

Evaluation: 23-25 June, 2008

Paper Submission: 1 September, 2008

Workshop: 7 November, 2008 in Washington, DC

Organizer: Informatics for Integrating Biology and the Bedside,

i2b2, a National Center for Biomedical Computing

Website: https://www.i2b2.org/NLP

The obesity challenge is a multi-class, multi-label classification task focused on obesity and its co-morbidities. The data for the challenge consist of discharge summaries from Partners Healthcare. All records have been fully de-identified. Obesity information and co-morbidities have been marked at a document level as present, absent, questionable, or unmentioned in the documents. For each patient, both textual judgments, i.e., what the text explicitly states about obesity and co-morbidities, and intuitive judgments, i.e., what the text implies about obesity and co-morbidities, are provided. The goal of the challenge is to evaluate systems on their ability to recognize whether a patient is obese and what co-morbidities they exhibit.

The obesity challenge opened to preregistration on February 1, 2008. Training data for the challenge will be released in installments; the first installment will be released on March 15, 2008. The rest of the installments will follow soon after. Test data are scheduled to be released for only three days and will be used only for evaluation purposes. The results of the challenge will be presented at the workshop organized by i2b2.

Evaluation Dates, File Formats, and Evaluation Metrics.

The obesity challenge evaluation will be on only the test data. Each team is allowed to upload up to three system runs. System output is expected in the form of standoff annotations, following the exact format of the ground truth annotations provided by i2b2. Precision, recall, and f-measure will be used as evaluation metrics.

Participants are asked to submit a short paper describing their system and analyzing their performance. Authors of top performing systems and of particularly novel approaches will be invited to present or demo their systems at the workshop.

Tentative Schedule February 1, 2008    Preregistration Open March 15, 2008    Training Data Release April 15, 2008    Commitment to Participate in Challenge June 23, 2008    Test Data Release at 9am EST June 25, 2008    Output Due at Midnight EST August 1, 2008    Notification of Results to Each Participant September 1, 2008    Short Papers Due October 1, 2008    Invitations to Present at the Workshop November 7, 2008    Workshop

Organizing Committee: Ozlem Uzuner, Chair, SUNY at Albany and Middle East Technical University North Cyprus Campus Peter Szolovits, MIT CSAIL Isaac Kohane, Partners Healthcare

Questions on the challenge can be addressed to Ozlem Uzuner, i2b2nlp at albany.edu.


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