Age-at-first-admission of schizophrenia, bipolar disorder and major depression: Implications of heterogeneity

Thomis, R.J., Welham, J.L., Davies, G., Chant, D., Comes, S. and McGrath, J.J. (2000). Age-at-first-admission of schizophrenia, bipolar disorder and major depression: Implications of heterogeneity. In: Schizophrenia Research: Abstracts of the Biennial Winter Workshop on Schizophrenia. Biennial Winter Workshop on Schizophrenia, Davos, Switzerland, (61-62). 5-11 February, 2000. doi:10.1016/S0920-9964(00)90435-3


Author Thomis, R.J.
Welham, J.L.
Davies, G.
Chant, D.
Comes, S.
McGrath, J.J.
Title of paper Age-at-first-admission of schizophrenia, bipolar disorder and major depression: Implications of heterogeneity
Conference name Biennial Winter Workshop on Schizophrenia
Conference location Davos, Switzerland
Conference dates 5-11 February, 2000
Proceedings title Schizophrenia Research: Abstracts of the Biennial Winter Workshop on Schizophrenia   Check publisher's open access policy
Journal name Schizophrenia Research   Check publisher's open access policy
Place of Publication Amsterdam
Publisher Elsevier
Publication Year 2000
DOI 10.1016/S0920-9964(00)90435-3
ISSN 0920-9964
Volume 41
Issue 1
Start page 61
End page 62
Total pages 2
Language eng
Abstract/Summary Age of onset is an important variable when considering the cause and course of mental illnesses. Given the debate about the relationship between psychotic disorders it would be useful to compare age-at-first-admission for ICD schizophrenia and for affective psychoses when the latter is differentiated into 'major depression' and 'bipolar disorder'. Data on age-at-first-admission for Australian-born individuals diagnosed with schizophrenia (ICD 295) or affective psychosis (ICD 296) were extracted from the Queensland Mental Health Statistics System -- a comprehensive, namelinked mental health register. Because the ICD 9 category 296.1 was used to code what is now called "major depressive episode', this group was differentiated from other 296 categorieswhich were considered bipolar disorders. Those receiving more than one diagnoses within these categories were excluded. All distributions show a wide age range of onset from early adolescence into the seventies and eighties. However the modal age-group for major depression ('60-69' for both sexes) is clearly different from bipolar disorder ('20-29' for males; '30- 39' for females), the latter distribution being more similar to the SCZ distribution (which had a model age-group of '20-29' for both sexes). While these distributions were similar for males and females, there were sex differences in the proportions within each diagnostic group: more males with schizophrenia, and more females with bipolar disorder and with major depression. Our results suggest heterogeneity within the affective psychoses as categorised by ICD 9, with bipolar disorder having an age-at-first-admission distribution more similar to schizophrenia than major depression. The Stanley Foundation supported this project.
Subjects 110319 Psychiatry (incl. Psychotherapy)
111714 Mental Health
Keyword Psychiatry
Q-Index Code EX
Q-Index Status Provisional Code
Institutional Status Unknown

Document type: Conference Paper
Collection: School of Medicine Publications
 
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Created: Mon, 13 Aug 2007, 21:34:39 EST