Background: Studies have compared electroconvulsive therapy (ECT) and repetitive transcranial magnetic stimulation (rTMS) with regard to their clinical efficacy in the treatment of depression, but only a few studies have addressed their differential impact on cognition. The purpose of this study was to compare the neurocognitive side effects of both treatment modalities.
Methods: In this comparative study, 40 patients with major depressive disorder referred for ECT were randomly assigned either to a course of 25 sessions of rTMS to the left dorsolateral prefrontal cortex or to a course of ECT ranging from 4 to 8 sessions. The primary outcome measures were the results of a cognitive battery that assessed different aspects of cognitive functioning. The cognitive battery comprised the Digit Span Subtest from the Wechsler Adult Intelligence Scale, the Stroop Color-Word Test-Victoria version, the Color Trails Test Trials 1 and 2, and the Rey-Osterrieth Complex Figure Test.
Results: At the end of treatment, scores on the Digit Span Subtest, the Stroop Color-Word Test-Victoria version, and the Color Trails Test showed statistically significant better results in the rTMS group compared with the ECT group.
Conclusions: rTMS was well tolerated with less negative impact on cognitive functioning than ECT.