Trust as an analytical concept for the study of welfare programmes to reduce child health disparities: The case of a Swedish postnatal home visiting programme

•Welfare programs implies a web of relationships between organisations and individuals.•Trust is an important tool to analyse the implementation process of welfare programs.•The development of relationships on macro, meso and micro levels requires trust.•The degree of trust can explain the successfulness of welfare programs. The aim of this article is to outline a theoretical framework for how the concept of trust can be used as analytical tool for a study of the aim, design, output and societal legitimacy of a Swedish welfare programme conducted to reduce disparities in health and social inequities and to give newborn a positive start in life. This programme, labelled Grow Safely, implies that home visits will be conducted at six occasions at first-time parents by different professionals: child health care nurses, midwifes, dental hygienists and counsellors from the social services. Prior to when the intervention is carried out, the involved professionals in the programme will be participating in training in order to increase the possibility that the home visits will be carried out in similar ways and be followed the same manual throughout the programme. The welfare programme will be based on relationships on different levels: between professionals and parents, between different professionals, between professionals and managers, and between organisations. Trust is believed to be of significance for the development of relationships as well as for the social legitimacy of the implantation of welfare programmes. Therefore, our ambition is to embrace a broad perspective on trust, combining insights from a variety of research traditions and analyses on macro, meso and micro levels in the outline a model for how the concept of trust can be used as an analytical tool for studying welfare programmes like Grow Safely. We argue for that the model can capture the significance of trust at different levels: individual, professional, organisational and societal levels as well as interplays between these levels, and consequently be useful in to analyse implementations of welfare programmes.