The British Journal of Psychiatry 149: 627-630 (1986)
© 1986 The Royal College of Psychiatrists
An American validation study of the Newcastle diagnostic scale. I. Relationship with the dexamethasone suppression test
M Zimmerman, B Pfohl, D Stangl and W Coryell
The Newcastle diagnostic index was completed on 159 depressed in- patients,
who received the dexamethasone suppression test during their first week in
hospital. Patients suffering from endogenous depression had a significantly
higher rate of DST non-suppression, were older, were more frequently
psychotic, and more frequently lost weight; even after controlling for
these variables, DST non-suppression was significantly more frequent in the
endogenous group. The relationship between Newcastle scores and the
frequency of DST non-suppression was non-linear.