Electroconvulsive Therapy and Long-Term Outcomes: What Real-World Data Finally Tells Us

By Joao L. de Quevedo, MD, PhD, Director, Center for Interventional Psychiatry UTHealth Houston
April 20, 2026

image of electricity for ect post Moving Beyond Short-Term Evidence

Electroconvulsive therapy (ECT) has long been recognized as one of the most effective treatments for severe psychiatric illness. Yet for many patients, families, and even clinicians, the most pressing questions are not about short-term symptom improvement—but about long-term safety and outcomes.

Does ECT increase the risk of dementia?
Does it affect cardiovascular health?
Does it actually save lives?

A recent comprehensive review published in the British Journal of Psychiatry provides some of the most compelling answers to date—leveraging large-scale administrative health data and modern statistical methods to address questions that traditional clinical trials cannot.

Why Traditional Studies Were Not Enough

Randomized clinical trials (RCTs) have clearly demonstrated that ECT is highly effective for depression and other severe psychiatric conditions. However, they have important limitations:

  • Typically short duration (often weeks)
  • Small sample sizes
  • Limited ability to detect rare outcomes

As highlighted in the paper, long-term outcomes such as dementia, cardiovascular events, and mortality require very large populations and extended follow-up—something only real-world data can provide.

A New Era: Administrative Health Data

This study synthesizes findings from population-level databases, sometimes including millions of patients, using advanced methods such as:

  • Propensity score matching
  • Regression adjustment
  • Target trial emulation

These approaches allow researchers to approximate real-world treatment effects while minimizing bias.

The result: a far clearer picture of the true long-term risks and benefits of ECT

Key Findings

1️. No Increased Risk of Dementia

One of the most common concerns about ECT is whether it leads to dementia.

The evidence is reassuring:

  • After adjusting for confounders, ECT does not increase the risk of dementia
  • This finding holds across multiple studies and populations

Importantly, depression itself is a known risk factor for dementia—making careful statistical adjustment essential.

2️. No Meaningful Increase in Cardiovascular or Cerebrovascular Risk

Despite the physiological changes during ECT (e.g., transient blood pressure and heart rate changes), the data show:

  • No consistent increase in major cardiovascular events
  • No increased risk of stroke

In some studies, there was even a suggestion of reduced cardiovascular mortality, though findings vary.

3️. Significant Reduction in Suicide Risk

One of the most striking findings:

ECT is associated with a 30–50% reduction in suicide deaths

This is particularly important given that ECT is often used in:

  • Severe depression
  • Acute suicidality
  • Psychotic depression

4️. Reduction in All-Cause Mortality

Perhaps the most important outcome:

ECT is associated with a 25–30% reduction in all-cause mortality

As illustrated in the figure on page 4, multiple large-scale studies across countries consistently show lower mortality rates among patients receiving ECT than among matched controls.

This is a powerful finding because:

  • It integrates both risks and benefits
  • It is not subject to diagnostic bias
  • It reflects real-world outcomes

A Critical Insight: ECT May Be Life-Saving

Taken together, the evidence supports a strong conclusion:

ECT is not only effective—it may be a life-saving intervention

The likely mechanism:

  • Reduction in suicide deaths
  • Stabilization of severe psychiatric illness
  • Minimal long-term medical risk

Addressing Persistent Misconceptions

Despite decades of evidence, ECT continues to face stigma driven by:

  • Historical practices
  • Media portrayals
  • Misunderstanding of risks

This study directly challenges several myths:

  • ❌ ECT causes dementia → Not supported by evidence
  • ❌ ECT is medically dangerous → No consistent increased risk
  • ❌ ECT is a last resort with high mortality → Associated with reduced mortality

UTHealth Houston Perspective

At the Center for Interventional Psychiatry at UTHealth Houston, these findings reinforce what we observe in clinical practice:

  • ECT is one of the most effective treatments for severe and treatment-resistant conditions
  • It is safe when performed using modern protocols
  • It plays a critical role in life-saving psychiatric care

We are committed to:

  • Expanding access to evidence-based treatments
  • Integrating data-driven decision-making
  • Reducing stigma through education and outreach

Implications for Patients, Clinicians, and Policymakers

1️. For Patients and Families

ECT should be understood as a safe and highly effective option, particularly in severe illness.

2️. For Clinicians

These findings support:

  • Earlier consideration of ECT
  • More confident counseling regarding long-term risks

3️. For Policymakers

Restricting access to ECT based on outdated concerns may:

Deny patients a treatment that reduces mortality

Final Thoughts

For many years, the debate around ECT has been shaped by limited data and persistent misconceptions.

This new generation of research changes that.

We now have robust, real-world evidence showing that ECT:

  • Does not increase long-term medical risks
  • Significantly reduces suicide deaths
  • May reduce overall mortality

This represents a critical shift:

From uncertainty → to clarity
From stigma → to science
From hesitation → to evidence-based care

For patients with severe psychiatric illness, this clarity matters.

Because access to ECT may not just improve lives—it may save them

Reference

Kaster TS, Rhee TG, Adler E, Kirov G. Electroconvulsive therapy: improved understanding of long-term risks and benefits from advances in administrative health data. British Journal of Psychiatry. 2026.

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Disclaimer

This article was created with the assistance of artificial intelligence (AI) to help organize and refine the presentation of scientific information. All medical and scientific content has been reviewed and approved by Joao L. de Quevedo, MD, PhD, Executive Director of the Center for Interventional Psychiatry at the John S. Dunn Behavioral Sciences Center at UTHealth Houston. The content is intended for educational and informational purposes only and does not substitute for professional medical advice.