The Children and Young People-Mental Health Safety Assessment Tool (CYP-MH SAT) study: protocol for the development and psychometric evaluation of an assessment tool to identify immediate risk of self-harm and suicide in children and young people (10-19 years) in acute paediatric hospital settings

Introduction:
Currently no standardised, evidence-based assessment tool for assessing immediate self-harm and suicide in acute paediatric inpatient settings exists.
Aim:
The aim of this study is to develop and test the psychometric properties of an assessment tool that identifies immediate risk of self-harm and suicide in children and young people (10-19 years) in acute paediatric hospital settings.
Methods and analysis:
Development phase: This phase involved a scoping review of the literature to identify and extract items from previously published suicide and self-harm risk assessment scales. Using a modified electronic Delphi approach these items will then be rated according to their relevance for assessment of immediate suicide or self-harm risk by expert professionals. Inclusion of items will be determined by 65-70% consensus between raters. Subsequently, a panel of expert members will convene to determine the face validity, appropriate phrasing, item order, and response format for the finalised items.
Psychometric testing phase: The finalised items will be tested for validity and reliability through a multi-centre, psychometric evaluation. Psychometric testing will be undertaken to determine the following: internal consistency; inter-rater reliability; convergent, divergent validity and concurrent validity.
Ethics and dissemination:
Ethical approval was provided by the NHS East Midlands - Derby Research Ethics Committee [17/EM/0347] and full governance clearance received by the Health Research Authority and local participating sites. Findings from this study will be disseminated to professionals and the public via peer reviewed journal publications, popular social media, and conference presentations.