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Error analysis of ad hoc information extraction of the concept age in the entire discharge letter.
| Number of Errors | Percentage | |
|---|---|---|
| Age in patient history | 18 | 0.13 |
| Age in family history | 15 | 0.11 |
| Relative years in patient history | 81 | 0.60 |
| Relative years to future events | 18 | 0.13 |
| Unexpected syntax | 4 | 0.03 |
