n2c2 2008 Obesity

These data were chosen from the discharge summaries of patients who were overweight or diabetic and had been hospitalized for obesity or diabetes sometime since 12/1/04. De-identification was performed semi-automatically.

All private health information was replaced with synthetic identifiers. The data for the challenge were annotated by two obesity experts from the Massachusetts General Hospital Weight Center. The experts were given a textual task, which asked them to classify each disease (see list of diseases above) as Present, Absent, Questionable, or Unmentioned based on explicitly documented information in the discharge summaries, e.g., the statement “the patient is obese”.