Key result
An 8-week mindfulness-based cognitive therapy intervention significantly reduced depression severity (HDRS17 score decreased from 14.54 to 4.31, p<0.0001) in patients with recurrent MDD and residual symptoms.
Why the study?
Many patients with major depressive disorder experience residual symptoms, with rumination serving as a known risk factor for onset, severity, prolongation, and relapse.
Does mindfulness-based cognitive therapy improve depression and alter resting-state theta oscillation dynamics in recurrent MDD patients with residual symptoms?
Does mindfulness-based cognitive therapy improve depression and alter resting-state theta oscillation dynamics in recurrent MDD patients with residual symptoms?
Standardized Mean Difference: 2.119
Absolute Event Rate: 4.31% vs 14.54%
p-value: p=<0.0001
MBCT alleviates depressive symptoms and enhances adaptive reflective rumination in recurrent MDD patients with residual symptoms, which is associated with the modulation of resting-state theta dynamics.
MBCT may reduce residual MDD symptoms; hypothesis-generating for theta power changes as correlate, requiring RCTs before clinical adoption.
Many patients with major depressive disorder (MDD) suffer from residual symptoms. Rumination is a specific known risk factor for the onset, severity, prolongation, and relapse of MDD. This study aimed to examine the efficacy and EEG substrates of mindfulness-based cognitive therapy (MBCT) in alleviating depression and rumination in an MDD population with residual symptoms. We recruited 26 recurrent MDD individuals who had residual symptoms with their current antidepressants to participate in the 8-week MBCT intervention. We evaluated the efficacy and changes in the dynamics of resting-state theta rhythm after the intervention, as well as the associations between theta alterations and improvements in depression and rumination. The participants showed reduced depression, enhanced adaptive reflective rumination, and increased theta power and phase synchronization after MBCT. The increased theta-band phase synchronizations between the right occipital regions and the right prefrontal, central, and parietal regions were associated with reduced depression, while the increase in theta power in the left parietal region was associated with improvements in reflective rumination. MBCT could alleviate depression and enhance adaptive, reflective rumination in recurrent MDD individuals with residual symptoms through the modulation of theta dynamics in specific brain regions.
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Wang et al. (2022) studied Recurrent Major Depressive Disorder (MDD) with residual symptoms (n=26). Mindfulness-Based Cognitive Therapy (MBCT) vs. Baseline (pre-MBCT) was evaluated on Change in 17-item Hamilton Rating Scale for Depression (HDRS17) score (Cohen's d 2.119, p=<0.0001). An 8-week mindfulness-based cognitive therapy intervention significantly reduced depression severity (HDRS17 score decreased from 14.54 to 4.31, p<0.0001) in patients with recurrent MDD and residual symptoms.
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