Table 4 Diagnosis, co-morbidity and psychopathology

1942–1993

Total N

54(88.5)

54 (88.5)

58 (95.0)

Primary

Schizophrenia 24 (44.4)

Delusions:

Hallucinations:

Mood disorders 7 (13.0)

Persecutory 46 (75.4)

Type clearly described 30 (52.6)

Delusional disorders 6 (11.1)

Grandiose 8 (13.1)

Not sufficient data 18 (47.4)

Secondary

Pure Shared delusional disorder 54 (88.5)

Delusions:

Hallucinations:

Co-morbidity 48 (89.0):

No difference in type or quality reported.

Same type but less intense quality 17 (29.3)

Dementia

Only in the secondary 2 (3%)

Depression

No sufficient data 39 (67.0)

Mental retardation

1993–2005

Total N

45 (100)

53 (87)

25 (59.5%)

Primary

Delusional disorder 15 (33.3)

Delusions:

Hallucinations:

Schizophrenia 13 (28.9)

Depression 3 (6.7)

Bipolar affective disorder 3 (6.7)

Induced delusional disorder 3 (6.7)

Mixed affective disorder 1 (2.2)

Psychosis (NOS) 1 (2.2)

Mixed affective disorder 1(2.2)

Mania 1 (2.2)

OCD 1 (2.2)

Cognitive impairment 1 (2.2)

Persecution 30 (35.3)

Grandiose 13 (15.3)

Erotomanic 4 (4.7)

Somatic 3 (3.5)

Infestation 1 (1.2)

Capgras' 1 (1.2)

Others:

Obsessions and compulsions 1 (1.2)

Auditory 11 (45.8)

Somatic 5 (20.8)

Visual 4 (16.6)

Tactile 3 (12.6)

Olfactory 1 (4.2)

Secondary

Pure Induced delusional disorder 30 (71.4)

Co-morbidity 12 (28.6):

Schizophrenia 6 (14.3)

Depression 3 (7.1)

Cognitive impairment 1 (2.4)

Bipolar affective disorder 2 (4.8)

Delusions:

No difference in type between primaries and secondaries. The intensity of the experiences was also identical in 98% of cases. In the remaining 2% secondary had less intense abnormal thoughts.

Hallucinations:

Same type but less intense quality 13 (52.0%)

As primary 11 (44.0)

Only in secondary 1 (4.0)*