Childhood adversity could cover many things including extreme difficulties and adverse experiences during childhood such as sexual, physical and emotional abuse, deprivation, and family dysfunction. Experiencing adversity during childhood may have a dramatic effect on a child's life. It has been linked to a number of poor outcomes in adulthood such as worse health outcomes, poor mental health, reduced life satisfaction and dementia. One in three adults diagnosed with mental health conditions are reported to have experienced childhood adversities therefore, there is the potential for life-long associations between childhood adversity and health, which need to be evaluated and accounted for. The proposed project will examine childhood adversity in three different UK populations and in a birth cohort and associations with a number of different outcomes including physica and mental health, poor lifestyle choice such as unhealthy diet, smoking and binge drinking and antisocial behaviours.