Table 1.

Feasibility definitions for the primary outcomes

	Description	Feasibility definition
Recruitment procedures	The number of individuals screened for study eligibility and consenting to participate were recorded. When an individual was not enrolled in the study, the reason for ineligibility or declining was recorded. The number of participants lost in each phase of the study was noted and the reasons for dropping out were recorded.	To recruit a total of 20 eligible and interested individuals within 3 months of initial study advertisement.
Data collection	The number and proportion of missing data points for each questionnaire was recorded and calculated. The number and proportion of participants lost in each phase of the study was noted and the reasons for dropping out were recorded. Feedback on the data collection method, clarity of questionnaires, and length of time to complete questionnaires was gathered during the 1-month follow-up interview.	No more than 20% missing data for secondary outcome measures and a minimum of 85% follow-up rate for enrolled participants.
Acceptability	Participants’ opinion regarding the acceptability of the intervention and their experience using the patient-education tool was investigated during the telephone interview. Additionally, reasons for participation in the study or for dropping out, as well as barriers and facilitators to reducing paracetamol intake in the study were explored during the 1-month follow-up interview.	Over 50% of participants answer ‘positively’ to questions regarding acceptability on the participant feedback survey (online supplemental appendix 2).