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New Research Moves Toward Personalized Treatment for Depression

by Ella

Depression, a mental health disorder that impacts millions globally, is influenced by a complex combination of psychological, biological, and social factors. As a result, its symptoms and causes vary widely, requiring a nuanced and individualized approach to treatment. A new study led by psychologists from the University of Alberta (U of A) and Radboud University in the Netherlands seeks to move the needle toward more personalized, effective care for depression.

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Published in PLOS One, the decade-long research highlights the need for a shift away from the “one-size-fits-all” approach in treating depression. Current treatment often involves a trial-and-error method, where various medications and therapies are tested until an effective combination is found. This process, while common, is not always successful, with around 50% of individuals not responding to first-line treatments.

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“The current standard of care for depression is inadequate,” said Zachary Cohen, senior author of the study and assistant professor in the U of A’s Department of Psychology. “We need a better way to treat depression based on individual characteristics, rather than a broad, generalized approach.”

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The study focused on depression in adults, combining data from randomized clinical trials worldwide. The research team evaluated five widely used treatments, including antidepressant medications, cognitive therapy, behavioral therapy, interpersonal therapy, and short-term psychodynamic therapy. The aim was to understand how various factors, such as age, gender, and co-occurring conditions like anxiety or personality disorders, influence treatment effectiveness.

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Lead researcher Ellen Driessen, an assistant professor of clinical psychology at Radboud University, emphasized the importance of understanding these variables. “We looked at whether certain characteristics, such as the presence of a comorbid condition, made a person more likely to benefit from one treatment method over another,” she explained.

The researchers’ ultimate goal is to create a clinical decision support tool—an algorithm designed to tailor treatment recommendations based on a patient’s individual profile. Unlike current guidelines, which offer general recommendations, the proposed tool would use variables like age, gender, and coexisting health conditions to generate personalized treatment suggestions.

To achieve this, the team spent nearly a decade analyzing data from over 60 clinical trials involving close to 10,000 patients. The process involved cleaning and combining data from various global studies, ensuring the tool would be based on robust evidence. Cohen noted that previous research has been limited by smaller sample sizes, which hinder the development of reliable predictive models for treatment selection.

“This study is a protocol for the future,” Cohen said. “We’ve laid out a plan, but the actual development of the clinical decision support tool will take another year or two.”

The researchers are optimistic about the future of this tool. Once developed, the tool will undergo clinical trials to evaluate its effectiveness in helping doctors match patients with the most suitable treatments. If successful, it could be scaled for use in clinical settings worldwide.

The team hopes this tool will provide clinicians with an efficient way to allocate treatment resources, ultimately improving patient outcomes and reducing the substantial personal and societal costs of depression.

“The potential for this tool to be globally applicable is exciting,” Cohen added. “What’s particularly promising is that the data required to generate recommendations is relatively easy to collect through self-report questionnaires or basic clinical demographic features. Additionally, the cost of implementation is expected to be low, making it accessible to a broad range of healthcare settings.”

With continued development, this personalized treatment approach could revolutionize the way depression is managed, offering a more tailored, effective solution for individuals facing this challenging condition.

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