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The Validity of the Different Versions of the Hamilton Depression Scale in Separating Remission Rates of Placebo and Antidepressants in Clinical Trials of Major Depression

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Abstract:
Our objectivewas to validate the different versions of the Hamilton
Depression Scale (HAM-D) both psychometrically (scalability) and
clinically in discriminating antidepressants fromplacebo in terms of remission
rates in an 8-week clinical trial in the acute treatment of major depression.
The traditional HAM-D17 version was compared with the shorter HAM-D6 and the longer HAM-D21 or HAM-D24 in a fixed-dose placebocontrolled
vortioxetine study. Clinical Global Impression of Severity scores were used to establish standardized cutoff scores for remission across each scale. Using these cutoff scores, we compared the ability of each scale to separate drug-placebo remission rates, evaluated by the number needed to treat for clinical evidence. The HAM-D6 was superior to HAM-D17 in separating drug-placebo remission rates at the end point, defined as number needed to treat of less than 10. More items in the longer HAM-D versions indicated smaller discriminating validity over placebo. The HAM-D6 indicated a dose effect on remission for vortioxetine in both moderate and severe major depression. The brief HAM-D6 was thus found superior to HAM-D17, HAM-D21, and HAM-D24 both in terms of scalability and in discriminating antidepressants from placebo.
Key Words: Hamilton Depression Scale, validation, scalability,
drug-placebo separation, major depression
OriginalsprogEngelsk
TidsskriftJournal of Clinical Psychopharmacology
Vol/bind36
Udgave nummer5
Sider (fra-til)453-456
Antal sider4
ISSN0271-0749
DOI
StatusUdgivet - 2016

ID: 48323072