Persistent depressive disorder appears to have its roots in a combination of genetic, biochemical, environmental, and psychological factors. In addition, chronic stress and trauma can provoke PDD. ...

Persistent depressive disorder (PDD) ... This represents close to 7.9 percent of all American adults. In addition, around 2.5 percent of Americans will experience PDD at least once in their lifetime.

Persistent Depressive Disorder (PDD), also known as dysthymia, is a chronic form of depression characterised by a persistent low mood and a lack of interest or pleasure in daily activities.

With fewer symptoms and less severe presentation, persistent depressive disorder (PDD) differs from clinical depression. If someone has become used to their baseline feelings of sadness, they ...

Children with PDD display a variety of severe behavioral disturbances. [2] They may not speak in words or may only speak noncommunicatively (eg, echoing statements that they hear rather than ...

The logic behind the changes seems sound. “There wasn’t any evidence after 17 years that [the DSM-IV diagnoses] reflected reality,” says Bryan King, director of Seattle Children’s Autism ...

Except for Rett disorder, which occurs almost exclusively in girls, most pervasive developmental disorders (PDDs) are less common in girls than in boys. Girls with PDD tend to have slightly lower ...