Interview guide
| Questions for participants | Follow-up/prompting questions |
| Tell us what it’s been like attending the assessment and treatment (brain stimulation) sessions. | |
| What obstacles have you had to face throughout the trial period? | What aspects/areas were challenging? How did it affect your back pain? |
| What is your perception of these brain stimulation sessions? | Do you feel the brain stimulation sessions was worth the time and effort/worthwhile? Why/why not? |
| Was it acceptable to you? | |
| Do you feel like you have gained anything from this experience? If so what? | What have you learned? How has this brain stimulation and the overall study experience changed your pain or function? Is there anything you’d identify as lacking in the treatment programme? What would you tell someone else thinking about participating in the same intervention? |
| Is there anything else you would like to share about the experience? |