Table 3.
Primary sources of error in automatic tag classification via the MetaMap API.
| Issue | Example tag | Prevalence (%) |
| Not a strictly health-related concept | #supportivebossesrock | 15 |
| Meaning of an identified word is incorrect | #spiders (refers to the sensation on the skin, not the eukaryote) | 12 |
| Missing a concept | #noscentedcandles (missed “no” and “candle”) | 11 |
| Missing an interrogative word | #whatthebodywantstoeat | 6 |
| Missing a verb | #dowhatworksforyou | 4 |
| Is a health-related concept but is not included | #structuralintegration | 4 |
| Missing mental process | #distancethepain | 3 |