Table 3
Reasons for Failure of Machine-based Extraction of Semantic Terms
| Reason for Failure | Example |
| Incorrect term used | “Basilar Angiomatosis” rather bacillary angiomatosis |
| Use of vernacular | “bugs” instead of infectious agent |
| Preferred term not used | “give” a drug rather than prescribe |
| Omitted words | “following levels” rather than following (drug) levels |
| Implied a condition | A patient with a “creatinine of 1.6” rather than kidney disease “low ejection fraction” rather than congestive heart failure |
| Abbreviations | “Hep C” unrecognized (Disease or Syndrome) |
| Acronyms | “HAART” could be interpreted as “heart” “MERSA” unrecognized |
