Positive effects persisted
For the most part, the positive effects of the intervention on children’s functioning persisted during nearly 2 decades of follow-up. The impact of the intervention “can be described as rapidly apparent by age 30 months and sustained through late adolescence,” wrote the authors.
Regarding the impact of age at the time of placement, the study found that, compared with children placed into foster care later, those who entered foster care earlier (younger than 33 months) had significantly higher IQ scores and relative alpha power, but there was no difference in physical growth.
For some outcomes, the benefits of earlier placement were apparent in early childhood but faded by adolescence. But Dr. Humphreys noted all placements were early by most definitions.
The researchers also assessed stability of foster care placements. Children were considered “stable” if they remained with their original foster family; they were considered “disrupted” if they no longer resided with the family.
Here, the study found some “striking results,” said Dr. Humphreys. The effect of placement stability was largest in adolescence, when, overall, those who had remained with their original foster family had better cognitive and physical outcomes and less severe symptoms of psychopathology compared to those who experienced placement disruptions.
As for sex differences, “it’s a mixed bag,” said Dr. Humphreys, although overall, “we didn’t see strong evidence of sex differences” in terms of outcomes.
The investigators were unable to examine trajectories of children’s functioning, which would have provided important information on aspects such as rate of growth and the shape of growth curves. Specific features of the institutional or foster care environment in Bucharest during the study may limit the generalizability of the findings to other settings.
Absolutely unique project
The study examined an “absolutely unique project” and had “very exciting” results that should have “important clinical implications,” commented the American Journal of Psychiatry editor-in-chief Ned Kalin, MD, Hedberg Professor and chair, department of psychiatry, University of Wisconsin–Madison.
The findings are “pretty dramatic,” added Dr. Kalin. “This is probably the study to be thinking about when considering the future of treatment and interventions in children who have suffered from this type of neglect, which is unfortunately extremely common worldwide, including in the U.S.”
In particular, the findings regarding improved psychopathology “bode well for the future,” said Dr. Kalin. “We know these types of problems are risk factors for the later development of depression and anxiety disorders. It will be really interesting to find out, but my guess is these kids will be protected as they mature further.”
The study was supported by the NIH, the John D. and Catherine T. MacArthur Foundation, the Palix Foundation, and the Jacobs Foundation. Dr. Humphreys has received research funding from the Brain and Behavior Research Foundation, the Caplan Foundation, the Jacobs Foundation, the National Science Foundation, the NIH, the Vanderbilt Institute for Clinical and Translational Research, the Vanderbilt Kennedy Center, and Vanderbilt University; she has received honoraria from the Journal of Clinical Child and Adolescent Psychology Future Directions Forum, Learning Grove, the University of Iowa, the University of Texas at Austin, and ZERO TO THREE.
A version of this article first appeared on Medscape.com.