Previous studies have suggested that children with sleep problems are more likely to display more externalizing behavior problems.4 Although a similar pattern was seen in our cohort, the severity of externalizing behavior problems in children with persistent sleep problems did not fall into the clinical range.5 (pediatrics.aappublications.org)
Likewise, after controlling for internalizing symptoms in childhood, Gregory et al. (2005) found persistent sleep problems in childhood to predict a diagnosis of anxiety but not depression in young adulthood. (link.springer.com)