Identifying and selecting outcome measures for the children and families domestic abuse core outcome set.

Background: The evidence base for child-focused domestic abuse (DA) interventions is weak. Part of the challenge is that studies measure a range of different outcomes using different outcome measurement instruments (OMI). To address this, a core outcome set (COS) comprising five outcomes was developed. The current study aimed to: (1) identify relevant OMIs and assess their quality for three outcomes in the DA-COS ( Methods and results: We carried out a four-stage mixed-methods process to identify, appraise, and reach consensus on relevant tools including targeted, systematic literature searches, participant workshops to define outcome concepts, OMI appraisal of psychometrics and acceptability, and a multi-participant consensus workshop to reach consensus on OMI selection. In total, 239 OMIs were initially identified and reduced to 18 through a systematic appraisal process. Following a rating process of acceptability and feasibility, eight OMIs were taken to a final consensus workshop which resulted in the identification and provisional recommendation of two subscales from a newly developed tool for Discussion: This work is the next step toward the development of a child and family-focused DA-COS, that we hope will enable co-ordinated outcome measurement within and between practice and research. Further work is needed to adapt and evaluate the selected OMI as well as to develop a new tool to measure