Qualitative interviews
Semi-structured interviews were undertaken with patients who had received SRT, nurses delivering the intervention, and the practice managers or GPs at participating practices, using separate interview schedules (see Supplementary Boxes S1–S3).The aim was to interview 15 patients, five in each of the three trial areas: Oxford, Manchester, and Lincolnshire. Patients were asked during their baseline assessment appointment for consent to be interviewed. Interviewees were selected from those consenting who had completed SRT within 6 months of interview, allowing exploration of how participants felt at various stages of the intervention. All nurses who delivered the intervention were contacted by the research team following consent and interviewed to explore their perceptions of providing SRT. Finally, practice managers or GPs from each participating practice were invited for interview, and those who consented were asked about their perceptions of the impact on the practice, and the sustainability and scalability of the intervention. Interviews were conducted by telephone and were digitally recorded and transcribed.