Appendix A. Explanation of feature importance categories.

Tobacco status	Current or past tobacco use
Tobacco risk	Risk rating based on tobacco use
Scrip substitution	If brand name has been substituted for different generic brand
Scrip repeat	Number of repeats on prescription
Scrip reason	Reason for prescription if recorded
Scrip product name	Brand name of drug prescribed
Scrip medication ID	Specific drug identification identifier
Scrip generic name	Generic drug brand
Scrip frequency	How often drug is to be taken/used
Scrip drug name	Chemical name
Scrip drug class	Therapeutic class
Reaction	Identified allergic reaction
Patient type
Patient pension	Presence or absence of pension and type (age/disability)
Patient gender
Patient DVA	Department of Veteran Affairs eligible
Patient ATSI	Identifies as Aboriginal or Torres Strait Islander descent
Patient age	In years
Pathology test: radiology	Presence of a radiology test and type
Pathology test	Presence of a pathology test and type
Pathology result	Results (with attributes of high or low, where given)
Measurement	Class of measurements such as weight, height, peak flow etc..
MBS	Medicare Benefit Schedule—billing details.
Immunization	Presence of immunizations
Historical scrip substitution	As above, but in the historical visits section
Historical scrip repeat	As above, but in the historical visits section
Historical scrip reason	As above, but in the historical visits section
Historical scrip product name	As above, but in the historical visits section
Historical scrip medication ID	As above, but in the historical visits section
Historical scrip generic name	As above, but in the historical visits section
Historical scrip frequency	As above, but in the historical visits section
Historical scrip drug name	As above, but in the historical visits section
Historical scrip drug class	As above, but in the historical visits section
Historical pathology test	As above, but in the historical visits section
Historical pathology result	As above, but in the historical visits section
Diagnosis name	Recorded diagnosis
Diagnosis category	SNOMED code and grouping of diagnosis
Clinical smoke	Smoking advice recorded
Clinical allergy	Recorded allergies
Clinical alcohol	Recorded alcohol use
Care goal	Presence and type of care goals in care plan
BP recorded	BP recorded in system at the time of visit
Alcohol risk	Calculated from alcohol recording
Alcohol drinks	Standard drinks per day
Alcohol days	Number of days per week.

Abbreviations: BP, blood pressure; ID, identity document.