Pervasive Developmental Disorders in Preschool Children Essay

Pervasive Developmental Disorders is the umbrella term for   neuro-developmental disorder exhibited in children which is characterized by language deficits, impaired social skills and abnormal behavior. PDDs include PDD-Not Otherwise Specified (PDD-NOS), Asperger Syndrome, Autism-, Chidhood Disintegrative-, and Rett Disorder. Increase patterns of autism disorders for the past 15 yrs at England may indicate changes in PDD and the study attempted PPD estimation in a defined geographic region.   Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚   Population under case study were obtained from child center developments Stafford, Cannock, and Wightwick in the Midlands, England from July 1998 to June 1999 with a target population of 15, 500 children born on and between January 1, 1992, to December 31, 1995, that were identified as residents for the specified area on June 6, 1998. Case identification for the disease proceeded by four consecutive stages. Stage 1 was primarily concerned with screening by health practitioners and/or pediatricians at 0 wk, 6 wk, 6-9 mo, 18-24 mo, and 3.25-3.50 yr and then their subsequent referrals for the possible children displaying the symptoms for the disease. five hundred seventy-six underwent this stage. The referred children undergo secondary screening, â€Å"Stage 2†, under the trained eye of a child development physician or a child development teamand when they have failed the test, they will undergo subsequent 2 wk assessment conducted by a multidisciplinary team —speech and language therapist, pediatric physical therapist, occupational therapist, dental nurse, nutritionist, and a nurse specialist in PDDs and associated intervention— using 2-hr activity and play to make PDD diagnosis. For stage 3, one hundred three children were diagnosed with PDD and 95 % of them underwent Stage 4. Parents naturally accompany their children during the activities. Strong suspects for the disease were further assessed (stage 4), with Autism Diagnostic Interview-Revised algorithm by developmental physicians and those positive for the disease undergo further psychometric assessment— Wechsler Preschool and Primary Scale of Intelligence and the Merrill-Palmer—conducted by a senior educational psychologist. Final diagnosis were carried out using DSM-IV diagnostic criteria to classify the PDD type of disorder. To test reliability of the study, blinding of 3 trained raters for the 38 AD-R tapes were carried out and then assessed for intraclass correlation coefficiency ( Ï social interaction=0.82; Ï verbal c. = 0.85, Ï non-verbal=0.87; Ï repetitive behavior =0.59, ÃŽ £=0.86) and personal assements. Results matched perfectly for the original diagnosis. PDD patients were undergo full laboratory chemistry tests as well as gene map, X test, electroencephalogram, and possibly CT and/or MRI scans (for neurologic damage suspects). Comparison analyses were assessed at ÃŽ ¡0.05 using Kruskal-Wallis and one-way ANOVA followed by post hoc Scheffà © pairwise comparisons.   Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚   Analysis for the 97 PDD referrals health visitors as having the highest number of referrals (81%) with the children averaging 35.7 mo at the referral time and 41 mo at the time of clinical diagnosis. Pairwise comparison indicates the order of mean age at the time of the referral for the different groups: Asperger Syndrome (47.5 mo )> PDD-NOS (37.2 mo)> AD (30 mo). ANOVA indicates significances at 11.3 mo and Post-Hoc Schaeffer test indicates similarity of order of mean age to that of non-parametric pairwise comparison.   Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚   There were no found differences for syndrome proportionality in the 77 males of the sample population. Thirty percent of the sample population was found to exhibit language impairment characterized by repetitive three-word phrases which was directly correlated to AD subtype. Psychrometric test reveals almost 26 % mental retardation. Two childen with CDD and Rett scored under moderate mental retardation. Chi-square test, P