María A Ramos-Olazagasti

Learn More
CONTEXT Volumetric studies have reported relatively decreased cortical thickness and gray matter volumes in adults with attention-deficit/hyperactivity disorder (ADHD) whose childhood status was retrospectively recalled. We present, to our knowledge, the first prospective study combining cortical thickness and voxel-based morphometry in adults diagnosed as(More)
BACKGROUND Attention-deficit/hyperactivity disorder (ADHD) is increasingly conceived as reflecting altered functional and structural brain connectivity. The latter can be addressed with diffusion tensor imaging (DTI). We examined fractional anisotropy (FA), a DTI index related to white matter structural properties, in adult male subjects diagnosed with ADHD(More)
Research on ethnic-minority youths' mental health has rarely examined developmental trajectories for the same ethnic group in contexts where they are a minority versus where they are the majority or mechanisms accounting for differences in trajectories across such contexts. This study examines Puerto Rican youth residing in two contexts, one in which they(More)
BACKGROUND Parental warmth (PW) has a strong influence on child development and may precede the onset of psychiatric disorders in children. PW is interconnected with other family processes (e.g., coercive discipline) that may also influence the development of psychiatric disorders in children. We prospectively examined the association between PW and child(More)
Early alcohol use is associated with multiple negative outcomes later in life, including substance use disorders. Identification of factors related to this very early risk indicator can help inform early prevention efforts. This study prospectively examined the relationship between childhood adversities and early initiation of alcohol use (by age 14) among(More)
OBJECTIVE To examine whether childhood attention-deficit/hyperactivity disorder (ADHD) predicts homelessness in adulthood, and whether the persistence of childhood ADHD through adolescence influences the likelihood of homelessness. METHOD A 33-year prospective, controlled, follow-up was performed of clinic-referred, 6- to 12-year-old boys of white(More)
OBJECTIVE To document the natural course of sensation seeking from childhood to adolescence, characterize distinct sensation seeking trajectories, and examine how these trajectories vary according to selected predictors. METHOD Data were obtained from the Boricua Youth Study, a longitudinal study of 2,491 children and adolescents of Puerto Rican(More)
The objective of this epidemiological study was to examine, using an ecological perspective, which individual and distal contextual factors (familial, social and cultural) are associated with bullying other children across two different sites. Our sample included 1,271 Puerto Rican children 10 and older years of age at baseline residing in the South Bronx(More)
  • 1