138 CHAPTER 2.3 Table SI1.5. Medicine columns and their allowed objects, attributes, and operators. # Object Attribute Operator Value Explanation Medicine [not] exists, Medicine atc equals (=), not equals (!=) Contains one or more ATC codes (e.g. B01AC06), optionally with wildcards (e.g. B01A*), separated by commas (e.g. B01AC06, B01AC08). frequency equals (=), not equals (!=), greater than (>), less than (<) Contains a number indicating the frequency of the medicine prescription, for example for yearly vaccines (e.g. 1, 2). Is always followed by interval. duration Contains a number indicating how long the medicine has been prescribed (e.g. 1, 2). Is always followed by interval. interval equals (=) Contains one of the following characters indicating a time interval: Y (years), M (months), W (weeks). Always preceded by frequency or duration. daily dose equals (=), not equals (!=), greater than (>), less than (<) Contains a number indicating the medicine’s daily dosage (e.g. 2.5, 50). Is always followed by unit. unit equals (=) Contains one of the following abbreviations indicating a unit of measurement: G (gram), MG (milligram). Always preceded by daily dose.
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