Table 1 Phase 1: intervention refinement. Study assessments

Socio-demographic data-women

At the start of the qualitative interviews

Bespoke questionnaire (age, ethnicity, education, employment, relationship status, time since end of abusive relationship, previous talking therapy)

Face-to-face/phone semi-structured qualitative interviews with women

Before the first mindfulness group

Topic guide exploring experiences of recovery after DVA, and any psychological support received (Supplementary file 1)

Socio-demographic data-professionals

At the start of the qualitative interviews

Bespoke questionnaire (age, gender, job title, years of delivering psychological therapy to people affected by violence and trauma)

Face-to-face/phone/Skype semi-structured qualitative interviews with professionals

Before the first mindfulness group

Topic guide exploring experiences of providing psychological interventions to people affected by violence and trauma (Supplementary file 1)

Online survey with experts in trauma and mindfulness

Before the first mindfulness group

Bespoke questionnaire: years of practice, 15 statements about trauma-specific modifications to a standard mindfulness-based cognitive therapy course grouped under three categories: participants, curriculum, and teacher. 5-point Likert scale (strongly disagree to strongly agree), free text comments (Supplementary file 2)

Remote consultations with experts in trauma and mindfulness

1. Before feasibility trial

2. Six months post-randomisation

1. Agenda covering seven statements from the survey that produced contention

2. Agenda covering areas of uncertainty identified through the process evaluation of the trial mindfulness groups