Background: Little is known about the effect adoption status has on psychological adjustment (for instance, depression, anxiety, problem behaviour, or drug misuse) in adulthood. The aim of this study was to conduct a meta-analysis to study the impact of adoption status on adult adoptees' psychological adjustment.
Method: The review included 18 quasi-experimental studies conducted between 1993 and 2019.
Results: Adoptees had significantly worse psychological adjustment than non-adoptees across all outcomes, except for the obsessive-compulsive disorder (OCD) and antisocial personality disorder (APD). The moderating analyses showed a significant effect for ethnicity and marital status.
Conclusions: Our results shed light on the specific groups of adoptees at a higher risk of maladjustment. The outcomes most strongly influenced by adoptive status were angry emotions (hostility and anger), psychiatric care, drug abuse, and psychotic symptoms. These findings have clinical implications with regard to the support that practitioners can provide to adoptees and their families.