Studies in Great-Britain and the USA have established the prevalence o
f 'age disorientation', defined as a discrepancy between true and subj
ective age of five years or more, as approximately 25% in the populati
on of long-stay patients with a diagnosis of schizophrenia. We examine
d ah schizophrenic patients in long-stay wards of three mental hospita
ls and found a prevalence of 6% (95% CI: 0.9-10.6%). We have no defini
tive explanation for this finding. 'Age disorientation' may be the res
ult of an interaction between a serious form of the illness and poor p
sychosocial treatment.