Effective dose of escitalopram in moderate versus severe DSM-IV major depression.
BACKGROUND
Data from the three available placebo-controlled trials with fixed doses of escitalopram in the acute therapy of DSM-IV major depressive disorder (MDD) were pooled. The hypothesis tested was that escitalopram 10 mg/d might be an effective dose in moderate MDD, whereas escitalopram 20 mg/d might be needed in severe depression.


METHODS
The Montgomery-Asberg Depression Scale with all 10 items was used at baseline to differentiate between moderate (score range 22 to 29) and severe (scores > or = 30) major depression. The MADRS (6) was selected as the primary efficacy parameter, using a standardised effect size of 0.40 as indicator of clinically significant response.


RESULTS
After 8 weeks of therapy, escitalopram 10 mg was superior to placebo, with a standardised effect size above 0.40 for patients with moderate depression, but not for those with severe depression. In contrast, 20 mg escitalopram was superior to placebo, with a standardised effect size above 0.40 in severe depression, but not in moderate depression. The MADRS (6) showed response (standardised effect sizes above 0.40) for moderate depression after two weeks of treatment with 10 mg escitalopram and in severely depressed patients after 4 weeks with 20 mg escitalopram.


CONCLUSIONS
Escitalopram 10 mg/d was the optimal dose for the treatment of moderate DSM-IV MDD, while escitalopram 20 mg/d was an effective dose in patients with moderate to severe depression.
Bech
P
P
Psychiatric Research Unit, Frederiksborg General Hospital, 3400 Hillerød, Denmark. pebe@fa.dk
Andersen
H F
HF
Wade
A
A
D018687:Antidepressive Agents, Second-Generation / Q000008:administration & dosage* / Q000009:adverse effects / Q000627:therapeutic use*; D015283:Citalopram / Q000008:administration & dosage* / Q000009:adverse effects / Q000627:therapeutic use*; D003866:Depressive Disorder / Q000188:drug therapy* / Q000523:psychology; D003865:Major Depressive Disorder / Q000188:drug therapy* / Q000523:psychology; D004305:Dose-Response Relationship, Drug; D006801:Humans; D011569:Psychiatric Status Rating Scales; D016032:Randomized Controlled Trials as Topic
D018687:Antidepressive Agents, Second-Generation; D015283:Citalopram