Response to electroconvulsive therapy is not consistently replicated across multiple treatment courses

Area of Science:

• Neuroscience
• Psychiatry
• Clinical Psychology

Background:

• Electroconvulsive therapy (ECT) is a vital treatment for severe psychiatric disorders, often requiring multiple treatment courses.
• Predicting patient response to subsequent ECT courses based on prior outcomes remains an area of clinical uncertainty.

Purpose of the Study:

• To investigate the correlation of treatment response, illness severity, quality of life (QoL), and cognitive function between two consecutive courses of ECT.
• To determine if prior ECT outcomes can predict responses in subsequent treatment phases.

Main Methods:

• A retrospective cohort study analyzed data from 226 patients who received at least two ECT courses.
• Statistical analyses, including Pearson's chi-square test and Pearson correlation coefficients, were used to compare outcomes between ECT courses.
• Illness severity was assessed using the Clinical Global Impression - Improvement (CGI-I) scale, and QoL was measured by the Q-LES-Q-SF.

Main Results:

• No significant correlation was found in response rates or cognitive function between the two ECT courses.
• Small correlations were observed at the group level between illness severity (CGI-I) and QoL (Q-LES-Q-SF) scores.
• Subgroup analyses revealed moderate QoL correlations in depression patients and small correlations in schizophrenia patients for both CGI-I and Q-LES-Q-SF.

Conclusions:

• While individual patient responses to ECT may vary across treatment courses, illness severity and QoL improvements often exhibit consistent trends.
• These findings underscore the importance of individualized treatment planning and collaborative decision-making in optimizing ECT outcomes.
• Further research is needed to explore factors influencing ECT response variability.