A study in the UK found that boys who engaged in antisocial behavior like skipping school or had parental issues like little supervision were at higher risk of premature death or disability by middle age. Boys who were delinquent at age 10 or convicted of a crime by age 18 had a 16.3% chance of death or disability by age 48 compared to 2.6% for boys without such issues. The study followed over 400 boys from ages 8-9 to 43-48 and found factors like antisocial behavior at a young age, criminal convictions, and lack of parental supervision correlated with higher rates of death and disability decades later. The reasons for this connection are unclear but may involve lasting impacts of childhood stress on health.