Cohort profile: Health and Attainment of Pupils in a Primary Education National Cohort (HAPPEN) - a hybrid total population cohort in Wales, UK.

PURPOSE

Health and Attainment of Pupils in a Primary Education National (HAPPEN) is a primary school national cohort which brings together education, health and well-being research in line with the Curriculum for Wales framework. Health, education and social care data are linked and held in the Secure Anonymised Information Linkage (SAIL) Databank. In addition, school-aged children complete the HAPPEN Survey to inform the design and implementation of the Health and Well-being curriculum. Over 600 schools take part in the HAPPEN Survey. Linkage of health and education records from the HAPPEN national cohort with HAPPEN Survey responses gives enriched cohort detail which can be used to extrapolate to other schools in Wales. We present the descriptive data available in HAPPEN, and the future expansion plans.

PARTICIPANTS

The HAPPEN cohort includes 37 902 primary-aged school children from 2016 to July 2023. Of this number, 28 019 can be linked in SAIL with their anonymised linkage field. In addition, to date (May 2024), HAPPEN Survey data have been captured from over 45 000 children, which can be linked to the electronic data. The survey continues to rise by 7000-8000 responses annually.

FINDINGS TO DATE

The cohort is 49% girls, 47% boys (3% prefer not to state their gender and 1% of this data is missing) and 14% are from an ethnic minority background (10% prefer not to state their ethnicity). Initial findings have explored the impact of COVID-19 on well-being and play opportunities, along with a longitudinal exploration of well-being throughout the years.

FUTURE PLANS

HAPPEN is an ongoing dynamic cohort of data collection. Access to the cohort is available through SAIL. Ongoing research includes the evaluation of interventions for primary school children such as natural experiment methods, free school meal roll-out in Wales, interventions to improve physical literacy including changes to the built environment and interventions to improve the health and well-being of primary school children.