TABLE 1.

Semi-structured interview guide

Questions	Parents/caregivers	Clinicians
Introductory	Are you a current or a former smoker? How long have you smoked? Have you made attempts to quit? If yes, did you make attempts to quit after you had a child/dependent with CF?	What is your role on the CF care team? How long have you provided care for children with CF?
Overarching	If we designed a program to help parents and caregivers of children with CF quit smoking, what are some things that it should include?	What are the barriers to smoking cessation in CF, and what are the prerequisites for a successful smoking cessation program in your CF Center?
Probing	1. Do you remember when and by whom you were first told that smoke exposure is bad for your child with CF? Can you tell me more about it? 2. Please tell me about the information you have received from the CF team about smoking? Was it helpful? Was it understandable? Was it received early or frequent enough? 3. Can you tell me how tobacco smoke affects the health of your child with CF? 4. Let’s talk about your experience with quitting. Do you feel it is/it was hard to quit? Why or why not? 5. What are some things that make it/made it harder for you to quit? What helped/would help you quit? 6. If the CF Center offered help to quit, what would be most helpful for you? 7. What else would motivate you to quit?	1. How harmful do you think it is for a child with CF to be exposed to tobacco smoke? 2. In your view, how important is smoking cessation compared to other components of CF care (eg, infection control, airway clearance, nutrition, treatment adherence)? 3. Do you feel that you have sufficient knowledge about smoking cessation? 4. How do you address smoking in your clinical practice? 5. Do you think smoke exposure is addressed adequately in CF care? Why or why not? 6. What are some things that make it hard to address smoking cessation in your CF Center? 7. What can you tell me about clinical care guidelines and protocols for smoke exposure in CF? What smoking cessation resources are available in your CF Center? 8. Do you think there is a need for smoking cessation intervention/program in your CF Center? 9. What needs to be in place for a successful smoking cessation program in your CF Center. 10. What do you believe are some key elements of a successful smoking cessation program?

Abbreviation: CF, cystic fibrosis