Feasibility and acceptability of the Alarm Distress Baby Scale (ADBB) in universal health visiting practice in England: a mixed-methods study using Normalisation Process Theory

Background The Alarm Distress Baby Scale (ADBB) is a validated observation tool, designed for use by healthcare practitioners to identify infant social withdrawal. A modified version (m-ADBB) was later developed as a clinically useful behavioural tool. However, neither version has been tested in the UK context. This study aimed to test the feasibility and acceptability of using the ADBB and m-ADBB within universal health visiting practice in England.Methods A mixed methods convergent parallel design was used. Five health visitors were trained in the ADBB and 20 in the m-ADBB, from two National Health Service (NHS) community sites in England. Quantitative data were collected from health visitors, while qualitative semistructured interviews were conducted with health visitors and service managers, guided by Normalisation Process Theory (NPT). Thematic analysis was used to analyse the qualitative data and descriptive analysis for the quantitative data. NPT provided a framework for analysing the implementation process in routine health visitor practice.Results The m-ADBB was used with 225 babies and behaviour concerns were identified in 23 babies (10%). Eleven themes were identified, aligned with the four NPT constructs: (1) Coherence: perceived uniqueness of the scale, new vocabulary for articulating baby behaviour, enrichment of existing knowledge and skills; (2) Cognitive participation: commitment to the use of the ADBB/m-ADBB, consolidation of new practice; (3) Collective action: implementation of the m-ADBB scale in routine practice, organisation and management support, existing systems and pathways for children and families and (4) Reflexive monitoring: perceived benefits of integrating the scales in practice, quality assurance for embedding the scales in practice, appraisal of the training and scales in practice.Conclusions The ADBB/m-ADBB was perceived to have enhanced the health visitors' skills and knowledge in infant observation. The m-ADBB required minimal additional time and was highly acceptable to health visitors. These findings have significant implications for health visiting practice and future research.