To determine the prevalence and clinical significance of a mixed anxie
ty-depressive (MAD) syndrome in primary care, a two-stage sampling des
ign was applied to 796 consecutive clinic attendees without known psyc
hiatric illness. Among 78 systematically interviewed subjects, 10.3% (
n = 8) had a depressive disorder alone, 12.8% (n = 10) had an anxiety
disorder alone, 19.2% (n = 15) had a comorbid anxiety and depressive d
isorder and 12.8% (n = 10) had a combination of subsyndromal anxiety a
nd depressive features that fulfilled either ICD-10 or our own operati
onal criteria for MAD. Patients with MAD rated their disability as bei
ng comparable to that of patients with anxiety or depressive disorders
. These findings lend support to the notion that there is a sizeable s
ubgroup of patients in primary care who appear to be suffering from a
psychiatric syndrome with an admixture of subsyndromal depressive and
anxiety features. Questions about the temporal stability of MAD and pr
eferred approaches to treatment have yet to be answered.