Both were in Liverpool and covered a total of 103 clients suffering primary major depressive disorders.

It can be a primary disorder caused by a biochemical or neurological disruption of a person's ability to sleep.

Avoiding the workplace may lead to chronification of the primary disorder.

It has been named as one of the sleep disorders most commonly misdiagnosed as a primary psychiatric disorder.

There are multiple medical conditions which may be misdiagnosed as a primary psychiatric disorder, complicating or delaying treatment.

For example, if the primary disorder is thyroid or pituitary disease, medicines will be prescribed.

It can be a primary disorder or a co-morbid one.

There are two primary disorders that affect the male reproductive external organs.

It can result from malabsorption secondary to gastro-intestinal disease or be a primary disorder.

There can also be a number of other mood symptoms or perceptual disturbances which mimic primary psychiatric disorders.