The Young Persons' Behaviour and Attitudes Survey (YPBAS) is a school-based survey carried out among 11-16 year olds and covers a wide range of topics relevant to the lives of young people today. The main aim of the YPBAS is to gain an insight into, and increase understanding of, the behaviours and lifestyles of adolescents. It also aims to influence various government policies and practices relating to young people and to facilitate access to research findings and expertise. YPBAS was introduced in 2000 as an omnibus survey of post-primary school children which replaced a number of previous surveys. It is a triennial study, conducted once every three years. Repeating this survey on a regular basis will allow government to continue to identify and monitor any significant changes, and if necessary, new policies and strategies will be developed and implemented as a result. Therefore to ensure comparability, the same methodology has been applied over the all rounds to date and the questionnaires were of a similar format.Further information is available on the Northern Ireland Statistics and Research Agency (NISRA) Young Persons' Behaviour and Attitudes Survey webpages. To accommodate demand for topics on the 2019 survey, two versions of the questionnaire were used. Schools were randomly assigned one version of the questionnaire. In 2019 a number of new topics were added into the questionnaire: CPR training, health services, historic environment, Irish and Ulster Scots, mother and father, programme for Government, social media and volunteering.