Table 2.

Analysis modes

Analysis mode	Read term trigger	Specific features
Death	Read term for death	Extract date of death and death certificate categories. Test results are not extracted.
Pregnancy	Read term for pregnancy or text stating ‘pregnant’	Duration in weeks is interpreted as gestational age
Labtest	Read term for test type	A numerical value or ‘normal’, ‘abnormal’ (depending on the test type) can be interpreted as the test result
Normal	Read term for certain investigations (e.g. chest radiograph)	The words ‘normal’ or ‘abnormal’ can be interpreted as the result
Date	Read term stating date	The text is expected to contain a single date
Sicknote	Read term stating ‘MED3’ (sickness certificate) or similar	Dates are regarded as sick certificate start and end dates
Standard	Read term not in one of the above categories	Standard analysis