Deficits in understanding the mental state of others (‘‘mind-reading’’) have been well documented in individuals with pervasive developmental disorders (PDD). However, it is unclear whether this deficit in social cognition differs between the subgroups of PDD defined by the Diagnostic and Statistical Manual of Mental Disorders, Fourth Edition, Text Revision. In this study, PDD was divided into ...

CONTEXT Prevalence rates of autism-spectrum disorders are uncertain, and speculation that their incidence is increasing continues to cause concern. OBJECTIVE To estimate the prevalence of pervasive developmental disorders (PDDs) in a geographically defined population of preschool children. DESIGN, SETTING, AND PARTICIPANTS Survey conducted July 1998 to June 1999 in Staffordshire, England. T...

The interrelationship between the Autism Diagnostic Interview-Revised (ADI-R), Autism Diagnostic Observation Schedule-Generic (ADOS-G) and clinical classification was studied in 184 children and adolescents with Mental Retardation (MR). The agreement between the ADI-R and ADOS-G was fair, with a substantial difference between younger and older children (5-8 vs. 8+ years). Compared with the Diag...

Sleep disturbances are regarded as a common clinical feature in autism and other Pervasive Developmental Disorders (PDD) that forms a great source of stress for families. Studies have shown that children with PDD exhibited qualitatively and quantitatively different sleep patterns to non autistic control children. This study aimed at describing sleep patterns in a sample of Egyptian children wit...

purpose: to report the rate of visual impairment in pervasive developmental disorder (pdd). methods: in this descriptive-analytic study 62 children with ppd diagnosed by a children psychiatrist were included. all subjects were evaluated for age, sex, systemic & eye conditions such as refractive errors, strabismus, oculomotor disorders, color vision, stereopsis, visual contact and fixation patte...

The purpose of this study was to observe quality of life (QoL) and global evolution of persons with Pervasive Developmental Disorders (PDD) in three different groups. Individualized programs for PDD were compared to traditional programs for intellectual disabilities. Behavioural disorders were repeatedly evaluated using the Aberrant Behaviour Checklist (ABC) and QoL once a year. Little research...

OBJECTIVE The aim of this study was to investigate the short-term efficacy and safety of methylphenidate (MPH) to treat attention-deficit/hyperactivity disorder (ADHD) symptoms in an understudied population of preschoolers with pervasive developmental disorder (PDD) or intellectual disability (ID). METHODS Fourteen preschoolers with developmental disorders (DD, n = 14; PDD, n = 12; ID, n = 2)...

We reviewed the stability of the diagnosis of pervasive developmental disorder not otherwise specified (PDD-NOS). A Medline search found eight studies reiterating a diagnostic assessment for PDD-NOS. The pooled group included 322 autistic disorder (AD) and 122 PDD-NOS cases. We used percentage of individuals with same diagnose at Times 1 and 2 as response criterion. The pooled Relative Risk was...

BACKGROUND There has been concern that the incidence of autism and other pervasive developmental disorders (PDDs) is increasing. Previous studies have been smaller, restricted to autism (excluding other pervasive developmental disorders such as Asperger's syndrome), included boys only, or have not been based on a national sample. We investigated time trends in the rates of diagnosis of pervasiv...

OBJECTIVES To investigate the link between autism disorders and engineering training of parents. METHODS All Autistic-Pervasive Developmental Disorders (PDD) children that were diagnosed on the bases of the Diagnostic and Statistical Manual for Mental Disorders (DSM-IV), and met the required criteria for autism, over a defined period (March 2006 to June 2007) were included. We then took all n...