Table 6.
Selection of semantic rules used for extraction in GATE format, each with example phrases they match
| Characteristic | |||||||
|---|---|---|---|---|---|---|---|
| Study design | Example | We | conducted | a | hospital-based | prospective cohort | study |
| Rule | (verb) | ({Token.string==~“(?i)a”}|{Token.string==~“(?i)an”}) | ({Token})[0,1] | (study) | (types)? | ||
| Population | Example | Cohort | of | 665 Danish pregnant women | |||
| Rule | ({Token.string==~“(?i)cohort”}|{Token.string==~“(?i)sample”}|{Token.string==~“(?i)total”}|{Token.string==~“(?i)samples”}|{Token.string==~“(?i)cross-sectional”}|{Token.string==~“(?i)subsample”}) | {Token.string==~“(?i)of”} | (population) | ||||
| Exposure | Example | Perfluorinated compounds | in relation to | birth weight | |||
| Rule | (folic_variations) | {Lookup.majorType==“relations”} | (birthoutcomes) | ||||
| Outcome | Example | association | with | miscarriage | |||
| Rule | {Lookup.majorType==“relations”} | ({Token.string==~“(?i)between”}|(with)) | ({Token.string==~“(?i)the”})? | (birthoutcomes) | |||
| Confounding factor | Example | Adjusting | for | covariates, including maternal pre-pregnancy BMI, smoking, education, and birth weight | |||
| Rule | (adjustment) | ({Token.string = ~“(?i)for”}|{Token.string = ~“(?i)by”}) | ({Token})[0,3] | (cnf) | |||
| Country | Example | In | Alberta | , | Canada | ||
| Rule | {Token.string==~“(?i)in”} | ({Token}) [1] | {Token.string==“,”} | ({Lookup.majorType==“countries”}|{Lookup.majorType==“states”}) | |||