a1 From the University Department of Psychiatry, Royal Liverpool Hospital, Liverpool
The Geriatric Mental State and a new computerized diagnostic system, AGECAT, are briefly described. A nomenclature for designating cases for epidemiological work is introduced. Concordance between AGECAT and psychiatrists' diagnoses for these studies, hospital and community based (total of 541 subjects), achieved overall kappa values of 0·84 for a psychiatric hospital sample and 0·74 for a community sample. The values for depression and organic illness specifically in these settings were psychiatric hospital 0·80/0·86, and community 0·80/0·88, respectively.
c1 Address for correspondence: Professor J. R. M. Copeland, University Department of Psychiatry, Royal Liverpool Hospital, PO Box 147, Liverpool L69 3BX.
p1 Present address: Park Lane Hospital, School Lane, Maghull, Liverpool L31 1HW.