Table 1.

Interview schedule and questions under each theoretical domain

Theoretical domain	Interview questions
Knowledge	What do you know about the use of antibiotics for self-limiting RTIs? What knowledge do you draw on when managing patients with RTIs?
Skills	What skills do you think are needed/helpful in managing these consultations? If you have decided not to prescribe an antibiotic, what skills are needed to help manage that consultation?
Social/professional role	What do you think is your role in reducing antibiotic use and antimicrobial resistance? To what extent do you see this as part of your job? What is the role of other practitioners in reducing antibiotic use and antimicrobial resistance?
Beliefs about capabilities	How confident do you feel that you are able to manage RTI consultations? How confident do you feel in making decisions about whether to prescribe antibiotics? What if you are unsure about a diagnosis?
Optimism	How confident are you that your consultations with patients with RTIs will have a positive outcome? How is this affected by whether an antibiotic is prescribed?
Beliefs about consequences	What factors influence your decision to prescribe antibiotics? What are the benefits and risks of not prescribing antibiotics for RTIs?
Goals	What are your goals when managing patients within RTI consultations?
Reinforcement	What factors may reinforce your decision to prescribe not to prescribe antibiotics? What factors hinder this decision process?
Intentions	What motivates you to prescribe or not?
Memory/attention/decision process	How do you decide whether or not to prescribe an antibiotic to someone presenting with RTI? What processes do you usually follow when managing patients with RTIs?
Environmental context and resources	What factors support or hinder you to manage these consultations (eg, practice setting, community factors and available resources)? How do systems in place support you to prescribe appropriately?
Social influences	How do patients influence the way you manage RTI consultations and whether you prescribe antibiotics? How do the people you work with influence your management of RTIs and your decisions around whether to prescribe antibiotics? How do you think you compare with other prescribers in terms of antibiotic prescribing for RTIs?
Emotion	How do consultations with patients with RTIs make you feel? Are there consultations that feel more difficult or uncomfortable? How do your feelings at the time (mood, feelings towards the patient, fatigue) affect whether or not you prescribe antibiotics?
Behavioural regulation	What things could support you to manage RTI consultations more satisfactorily for you and the patient? How do you ensure that your antibiotic prescribing is appropriate to the situation? What things support you to make decisions about antibiotic prescribing?

RTI, respiratory tract infection.