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Strategic use of new generation antidepressants for depression: SUN(^_^) D protocol update and statistical analysis

Naohiro Yonemoto1,2, Shiro Tanaka3, Toshi A Furukawa4,5

  • 1Department of Neuropsychopharmacology, National Institute of Mental Health, National Center of Neurology and Psychiatry, 4-1-1 Ogawa-Higashi, Kodaira, Tokyo, 187-8553, Japan. nyonemoto@gmail.com.

Trials
|October 16, 2015
PubMed
Abstract

Insights

The SUN(^_^)D trial updates its protocol for major depressive episodes, optimizing first- and second-line antidepressant strategies. This pragmatic mega-trial ensures unbiased reporting of treatment effectiveness.

Area of Science:

  • Psychiatry and Clinical Psychology
  • Pharmacology and Pharmaceutical Sciences

Background:

  • The SUN(^_^)D trial investigates optimal treatment strategies for unipolar major depressive episodes.
  • It employs a pragmatic mega-trial design with three steps and two randomizations for first- and second-line antidepressant treatments.
  • The trial was registered on ClinicalTrials.gov (NCT01109693) in April 2010.

Purpose of the Study:

  • To present the updated protocol and statistical analysis plan for the SUN(^_^)D trial.
  • To refine the reporting of primary and secondary outcomes for enhanced clinical relevance.
  • To minimize reporting bias and data-driven results in the trial analysis.

Main Methods:

  • An assessor-blinded, parallel-group, multicenter pragmatic mega-trial design.
  • Step I: Minimum vs. maximum dosing for first-line antidepressants.
  • Step II: Continuation, augmentation, or switching strategies for second-line antidepressants; Step III: Naturalistic continuation phase.

Main Results:

  • Two key protocol changes were implemented: sample size adjustment due to lower dropout rates and refined outcome organization.
  • The updated protocol details primary and secondary outcomes and their analyses for two separate main results reports.
  • A blind interpretation committee will convene before randomization codes are broken.

Conclusions:

  • This updated protocol and statistical analysis plan facilitate unbiased and interpretable reporting of the SUN(^_^)D trial findings.
  • The modifications aim to enhance the clinical applicability of the results regarding antidepressant treatment strategies.
  • The trial is structured to provide robust evidence on optimizing depression management.

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