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Social and environmental factors associated with preschoolers' nonsedentary physical activity.
The twofold purposes of the investigation were (a) to describe with direct observation data the physical activity behaviors and the accompanying social and environmental events of those behaviors forExpand
Prevalence of PTSD in a community sample of older adolescents.
OBJECTIVE To examine prevalence and correlates of trauma and posttraumatic stress disorder (PTSD) symptoms and diagnosis in older adolescents aged 16 through 22 years. METHOD The second cycle of aExpand
Frequency of obsessive-compulsive disorder in a community sample of young adolescents.
OBJECTIVE To investigate the frequency and phenomenology of obsessive-compulsive disorder (OCD) and subclinical OCD in young adolescents. METHOD A two-stage epidemiological study originallyExpand
Environmental measures of physical activity supports: perception versus reality.
BACKGROUND Perceptions of the environment and physical activity have been associated using survey methods, yet little is known about the validity of environmental surveys. In this study, perceptionsExpand
Associations of perceived social and physical environmental supports with physical activity and walking behavior.
We evaluated perceived social and environmental supports for physical activity and walking using multivariable modeling. Perceptions were obtained on a sample of households in a southeastern county.Expand
Posttraumatic stress disorder in adolescents after Hurricane Andrew.
OBJECTIVE To examine rates and correlates of posttraumatic stress disorder (PTSD) in adolescents after Hurricane Andrew. METHOD A random-digit dialing sample of 158 Hispanic, 116 black, and 104Expand
Directly observed physical activity levels in preschool children.
BACKGROUND Millions of young children attend preschools and other structured child development programs, but little is known about their physical activity levels while in those settings. The purposeExpand
Imputation of missing data when measuring physical activity by accelerometry.
PURPOSE We consider the issue of summarizing accelerometer activity count data accumulated over multiple days when the time interval in which the monitor is worn is not uniform for every subject on every day. Expand
Policies and Characteristics of the Preschool Environment and Physical Activity of Young Children
OBJECTIVE. The purpose of this study was to examine policies and characteristics of preschools and the extent to which they influence the physical activity of 3- to 5-year-old children during theExpand
Physical violence during pregnancy: maternal complications and birth outcomes.
OBJECTIVE To assess the association between physical violence during the 12 months before delivery and maternal complications and birth outcomes. METHODS We used population-based data from 6143Expand