[DUPLICATE] Cost effectiveness of a web-based decision aid for parents deciding about MMR vaccination: a three-arm cluster randomised controlled trial in primary care.

BACKGROUND: Levels of measles in England and Wales are at their highest for 18 years- and strategies targeting the different groups of parents who do not vaccinate their children continue to be needed. Decision aids for decisions regarding childhood immunisation appear to be effective in achieving an increase in vaccine uptake but their cost effectiveness is unknown. AIM: To assess the cost effectiveness of a web-based decision aid to increase uptake of the MMR vaccine. DESIGN AND SETTING: Economic evaluation conducted alongside a cluster randomised controlled trial using urban GP practices in the north of England. METHOD: Fifty GP practices in the north of England were randomised to one of three trial arms: decision aid- leaflet- usual practice. A total of 220 first-time parents (child aged 3-12 months) were recruited. Parents self-reported their contacts with the NHS and other previous/expected resource utilisation/ associated costs were calculated. Vaccine-uptake data were collected from GP practices. A co