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Pervasive developmental disorder not otherwise specified (PDD-NOS), which includes atypical autism, and is the most common (47% of autism diagnoses); [10] Typical autism, the best-known; Asperger syndrome (9% of autism diagnoses); Rett syndrome; and; Childhood disintegrative disorder (CDD).
PDD-NOS is not a current part of the Diagnostic and Statistical Manual of Mental Disorders typology (as of the DSM-5), which is the most common diagnostic typology used in the United States. In the still used (though deprecated) ICD-10, it is considered "atypical autism" and "pervasive developmental disorder, unspecified". [8]
Developmental disability is a diverse group of chronic conditions, comprising mental or physical impairments that arise before adulthood. Developmental disabilities cause individuals living with them many difficulties in certain areas of life, especially in "language, mobility, learning, self-help, and independent living". [1]
The scientific study of the causes of developmental disorders involves many theories. Some of the major differences between these theories involves whether environment disrupts normal development, if abnormalities are pre-determined, or if they are products of human evolutionary history which become disorders in modern environments (see evolutionary psychiatry). [5]
Children exposed to lead at a young age will also have an increased chance of developing ADHD. Brain injuries could cause ADHD, yet only a small number of children diagnosed fit into this category. Researchers have looked into sugar intake as the cause of ADHD, but have found little to support that theory.
Chinese stocks have surged over the past month, with PDD Holdings up 55% over the past month and GDS Holdings up 21%, even counting today's sell-off. LVMH's 5.6% gain, while paltry compared to ...
Pathological demand avoidance (PDA) or extreme demand avoidance (EDA) is a proposed disorder, and proposed pervasive developmental disorder, defined by characteristics such as a demand avoidance—which is a greater-than-typical refusal to comply with requests or expectations—and extreme efforts to avoid social demands. [1]
In total, PDD Holdings serves over 900 million consumers from around the world. PDD Holdings’ IPO. PDD Holdings went public on the Nasdaq stock exchange on July 26, 2018, raising about $1.6 billion.