This protocol summarises plans for the development of trauma-informed guidance to support the implementation of the Domestic Abuse Core Outcome Set (DA-COS).
We have commissioned the University of Sussex to develop guidance to support the implementation of the Domestic Abuse Core Outcome Set (DA-COS).
Inconsistent outcome reporting and the use of a wide range of measures present challenges to generating high-quality evidence for the effectiveness of different interventions that support children and families affected by domestic abuse. To develop the DA-COS, survivors, service providers, commissioners, policymakers, and researchers agreed on a small number of outcomes that are the most important to measure. In July 2025, we published research which sought to provide recommendations as to how the five outcomes in the DA-COS should be measured. This work identified valid and reliable tools to measure the impact of services on the outcomes of children who experience domestic violence and abuse. Read the full reports here.
Implementing the DA-COS presents an opportunity to standardise outcome measurement, enhance service effectiveness, and advance evidence-informed commissioning. However, integrating routine outcome measurement, especially in trauma affected and under-resourced settings, can be operationally and ethically challenging if not accompanied by clear, context-sensitive guidance.
The University of Sussex are developing guidance to ensure that the DA-COS is used ethically, effectively, and safely, with outcome measurement processes that are sensitive to survivors’ experiences, reduce risks of harm, and promote equitable participation across diverse contexts.
This is a nine-month project to produce electronic guidance, including structured participant engagement to define the scope and purpose of the guidance, rapid reviews of relevant evidence, and iterative drafting of recommendations grounded in research and lived experience.
Rated 1: Set up and delivery is low cost, equivalent to an estimated unit cost of less than £100.
Rated 2: Set up and delivery is medium-low cost, equivalent to an estimated unit cost of £100–£499.
Rated 3: Set up and delivery is medium cost, equivalent to an estimated unit cost of £500–£999.
Rated 4: Set up and delivery is medium-high cost, equivalent to an estimated unit cost of £1,000–£2,000.
Rating 5: Set up and delivery is high cost. Equivalent to an estimated unit cost of more than £2,000.
Set up and delivery cost is not applicable, not available, or has not been calculated.
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Supporting children’s mental health and wellbeing: Lorem ipsum dolor sit amet, consectetuer adipiscing elit. Aenean commodo ligula eget dolor. Aenean massa. Cum sociis natoque penatibus et magnis dis parturient.
Preventing child maltreatment: Lorem ipsum dolor sit amet, consectetuer adipiscing elit. Aenean commodo ligula eget dolor. Aenean massa. Cum sociis natoque penatibus et magnis dis parturient.
Enhancing school achievement & employment: Lorem ipsum dolor sit amet, consectetuer adipiscing elit. Aenean commodo ligula eget dolor. Aenean massa. Cum sociis natoque penatibus et magnis dis parturient.
Preventing crime, violence and antisocial behaviour: Lorem ipsum dolor sit amet, consectetuer adipiscing elit. Aenean commodo ligula eget dolor. Aenean massa. Cum sociis natoque penatibus et magnis dis parturient.
Preventing substance abuse: Lorem ipsum dolor sit amet, consectetuer adipiscing elit. Aenean commodo ligula eget dolor. Aenean massa. Cum sociis natoque penatibus et magnis dis parturient.
Preventing risky sexual behaviour & teen pregnancy: Lorem ipsum dolor sit amet, consectetuer adipiscing elit. Aenean commodo ligula eget dolor. Aenean massa. Cum sociis natoque penatibus et magnis dis parturient.
Preventing obesity and promoting healthy physical development: Lorem ipsum dolor sit amet, consectetuer adipiscing elit. Aenean commodo ligula eget dolor. Aenean massa. Cum sociis natoque penatibus et magnis dis parturient.
Rated 2: Has preliminary evidence of improving a child outcome from a quantitative impact study, but there is not yet evidence of causal impact.
Rated 2+: Meets the level 2 rating and the best available evidence is based on a study which is more rigorous than a level 2 standard but does not meet the level 3 standard.
Rated 3: Has evidence of a short-term positive impact from at least one rigorous study.
Rated 3+: Meets the level 3 rating and has evidence from other studies with a comparison group at level 2 or higher.
Rated 4: Has evidence of a long-term positive impact through at least two rigorous studies.
Rated 4+: Meets the level 4 rating and has at least a third study contributing to the Level 4 rating, with at least one of the studies conducted independently of the intervention provider.
Rating has a *: The evidence base includes mixed findings i.e., studies suggesting positive impact alongside studies, which on balance, indicate no effect or negative impact.
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