Lower earnings
Across the sample, men were more likely to have higher earnings and less likely to receive welfare each year, but they also were less likely to have an intimate partner or have children in the household. Among those with the high externalizing profile, men were significantly less likely to receive welfare. Among the comorbid profile, men were less likely to have children in the household.
Compared with the no-symptom or low-symptom profile, those in the high externalizing profile earned $5,904 less per year and had a two-times–higher incidence of welfare receipt. Those in the high internalizing profile earned $8,473 less per year, had a 2.07-times higher incidence of welfare receipt, and had a lower incidence of intimate partnership.
Compared with the high externalizing profile, those in the comorbid profile earned $9,126 less per year, had a higher incidence of annual welfare receipt, had a lower incidence of intimate partnership, and were less likely to have children in the household. Similarly, compared with the high internalizing profile, those in the comorbid profile earned $6,558 less per year and were more likely to exhibit the other poor long-term outcomes. Participants in the high internalizing profile earned $2,568 less per year than those in the high externalizing profile.
During a 40-year working career, the estimated lost personal employment earnings were $140,515 for the high externalizing profile, $201,657 for the high internalizing profile, and $357,737 for the comorbid profile, compared with those in the no-symptom or low-symptom profile.
“We know that children with externalizing and internalizing symptoms can have many problems in the short term – like social difficulties and lower education attainment – but it’s important to also understand the potential long-term outcomes,” study author Francis Vergunst, DPhil/PhD, an associate professor of child psychosocial difficulties at the University of Oslo, told this news organization.
“For example, when people have insufficient income, are forced to seek welfare support, or lack the social support structure that comes from an intimate partnership, it can have profound consequences for their mental health and well-being – and for society as a whole,” he said. “Understanding this helps to build the case for early prevention programs that can reduce childhood externalizing and internalizing problems and improve long-term outcomes.”
Several mechanisms could explain the associations found across the childhood symptom profiles, the study authors wrote. For instance, children with early behavior problems may be more likely to engage in risky adolescent activities, such as substance use, delinquent peer affiliations, and academic underachievement, which affects their transition to adulthood and accumulation of social and economic capital throughout life. Those with comorbid symptoms likely experience a compounded effect.
Future studies should investigate how to intervene effectively to support children, particularly those with comorbid externalizing and internalizing symptoms, the study authors write.
“Currently, most published studies focus on children with either externalizing or internalizing problems (and these programs can be effective, especially for externalizing problems), but we know very little about how to improve long-term outcomes for children with comorbid symptoms,” Dr. Vergunst said. “Given the large costs of these problems for individuals and society, this is a critical area for further research.”