Both studies appear in a special section on children and disaster in the July/August issue of the journal Child Development.
In the first study, researchers found higher rates of clinically significant behavior problems among preschool children directly exposed to 9/11 in Lower Manhattan according to whether their mothers had post-traumatic stress disorder (PTSD) and depression.
In the second study, New York City adolescents and their mothers had generally elevated rates of PTSD and depression one year after 9/11.
Direct exposure to the events of 9/11 played a small, but significant role in explaining the severity of mental health symptoms, the study said.
The first study, by researchers from Mount Sinai School of Medicine, the Jewish Board of Family and Children's Services, and the Bronx Department of Veterans Affairs Medical Center, looked at more than 100 moms and their preschool children who were directly exposed to the World Trade Center attacks.
The families were recruited through extensive outreach in the Lower Manhattan area, primarily to preschools, between March 2003 and December 2005.
The second study was carried out by researchers from the University of Michigan, New York University, the Austin Independent School District, and Sesame Workshop.
Together, the two studies suggest that responding to children's post-trauma needs requires an understanding of how the children were exposed and of the impact of trauma-related changes in parent-child relationships. (ANI)