The incidence of first admissions for delusional disorder is lower, from 0.001 to 0.003%.Delusional disorder tends to appear in middle to late adult life, and for the most part first admissions to hospital for delusional disorder occur between age 33 and 55. It is more common in women than men, and immigrants seem to be at higher risk. Criticism
In some situations the delusion may turn out to be true belief. For example, in delusional jealousy, where a person believes that the partner is being unfaithful (in extreme cases perhaps going so far as to follow the partner into the bathroom, believing the other to be seeing a lover even during the briefest of separations), it may actually be true that the partner is having sexual relations with another person. In this case, the delusion does not cease to be a delusion because the content later turns out to be verified as true or the partner actually chose to engage in the behavior of which they were being accused. In other cases, the delusion may be mistakenly assumed to be false by a doctor or psychiatrist assessing the belief, just because it seems to be unlikely, bizarre or held with excessive conviction. Psychiatrists rarely have the time or resources to check the validity of a persons claims leading to some true beliefs to be erroneously classified as delusional. This is known as the Martha Mitchell effect, after the wife of the attorney general who alleged that illegal activity was taking place in the White House.
Pica or PICA may refer to:

Biology
Pica (disorder), an abnormal appetite for earth and other non-foods
Posterior inferior cerebellar artery, a major artery supplying blood to the cerebellum

Organisms
Aechmea Pica, a hybrid cultivar in the Bromeliad family of flowering plants
Pica (genus), a genus of magpie
Pika, a small mammal (archaic spelling "pica")

Organizations
OCLC PICA, a library automation company
Palestine Jewish Colonization Association, known by its Yiddish acronym as PICA
Pennsylvania Intergovernmental Cooperation Authority, a governmental agency in Philadelphia, Pennsylvania
Perth Institute of Contemporary Arts, Western Australia
Pica Press, a publishing imprint
Pittsburgh Intergovernmental Cooperation Authority, a governmental agency in Pittsburgh, Pennsylvania
Portland Institute for Contemporary Art, Oregon

People
Antonio Pica (1923–2014), Spanish actor
Joe Pica (1923–1973), American pianist
Pierre Pica (born 1951), French linguist
Teresa P. Pica (1945–2011), American educator
Tina Pica (1884–1968), Italian actress
Yamantaka Eye (born 1964), Japanese artist known as DJ Pica Pica Pica (DJ 光光光)

Places
Pica, Chile, an oasis town in the Atacama Desert of Chile
Limón de Pica, a lime variety from Pica
Pica, Cumbria, a village in northwest England
Pica, Jayuya, Puerto Rico, a barrio

Technology
Acer PICA, a system logic chipset introduced in 1993
Phenolic-impregnated carbon ablator, a spacecraft heat shield material
Pre-integrated COF APM, part of the International Space Stations Columbus module systems

Other uses
Pica, an alternative name for the grape Merille
Pica, a lance used by a picador in bullfighting
Pica (typography), a unit of length used in typesetting and document layout
píča, a rude expression for a vagina in the Czech Republic and Slovakia

See also
Pico (disambiguation)
Piga (disambiguation)
Pika (disambiguation)