Important insights into the melancholic subtype of major depression (as characterized by DSM criteria1) are revealed by a new pan-European study conducted by the long-established European Group for the Study of Resistant Depression and reported at CINP 2021 Virtual by Lucie Bartova (Medical University of Vienna, Austria).
The cross-sectional survey of 1410 patients, with retrospective assessment of treatment response, shows that melancholic depression is:
- found in 60.7% of patients with major depressive disorder (MDD)
- associated with a significantly greater likelihood of unemployment
- more severe than non-melancholic MDD and more likely to lead to inpatient treatment, and
- associated with psychotic features and suicide risk.
Treatment outcome was similar for melancholic and non-melancholic patients
Adjunctive treatment used in 39%
People with melancholic depression were more likely than those with non-melancholic features to have received adjunctive therapy (39% vs 14%). Thirty-three percent had had an adjunctive antipsychotic, compared with only 14% of non-melancholic patients.
The difference in use of adjunctive medication in melancholic patients was greatest for benzodiazepines (40% vs 22%) and least for mood stabilizers (13% vs 9%).
Dr Bartova was inclined to view the greater use of augmentation or combination strategies in melancholic patients as related to their more severe condition. If so, the strategy seems to work since outcomes in melancholic and non-melancholic patients were very similar.
Outcomes in melancholic and non-melancholic patients were very similar
Response rates almost identical
Response was judged to have occurred in 25% of the melancholic subtype and 24% of non-melancholic patients. Around 40% of both groups were regarded as treatment resistant.
Melancholic features represent a subtype of MDD characterized by features such as anhedonia and emotional blunting, agitation or retardation, guilt, early waking and weight gain, 1 and the subtype is commonly thought of as biologically determined. But much remained to be known about its prevalence in real world populations and its responsiveness to therapy.
Previous studies2-4 had suggested that melancholic MDD, when compared with non-melancholic patients, is less likely to respond to SSRIs, more likely to respond to ECT, and less likely to respond to psychotherapy. Treatment response in general is faster, and the placebo response in clinical trials is relatively low.