Delay discounting correlates with depression but does not predict relapse after antidepressant discontinuation

Area of Science:

• Neuroscience
• Psychiatry
• Behavioral Economics

Background:

• Major Depressive Disorder (MDD) relapse is common after discontinuing antidepressant medication (ADM).
• Predictors for relapse are needed.
• Delay discounting, a measure of impatience, is linked to MDD and may predict relapse.

Purpose of the Study:

• To investigate if delay discounting predicts relapse in Major Depressive Disorder (MDD) patients after discontinuing antidepressant medication (ADM).
• To compare delay discounting between remitted MDD patients and controls.
• To examine changes in delay discounting after ADM discontinuation.

Main Methods:

• Multi-site study measuring delay discounting in remitted MDD patients (N=97) and controls (N=54).
• Measurements taken before and within six months after ADM discontinuation in the MDD group.
• Predictive models used to assess baseline discounting and early changes in predicting relapse over six months.

Main Results:

• Remitted MDD patients exhibited significantly higher baseline delay discounting than controls (p < 0.05).
• Baseline delay discounting positively correlated with depression severity (Spearman ρ = 0.24).
• Delay discounting did not increase after ADM discontinuation and did not predict relapse.

Conclusions:

• Delay discounting is elevated in remitted MDD patients on ADM.
• Delay discounting does not change upon ADM discontinuation.
• Delay discounting is not a reliable predictor of relapse in MDD after ADM discontinuation.