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Abstract Background The usefulness of repetitious transcranial magnetic stimulation (rTMS) and its protocols in the treatment of major depressive disorder (MDD) remains controversial. This study aimed to evaluate the efficacy of rTMS in treating a sample of patients with MDD who did not respond to conventional treatment. Results The Hamilton Depression Rating Scale (HDRS) scores for the active rTMS group were 19.66 ± 6.70 at baseline, 12.50 ± 6.69 at 2 weeks, and 11.23 ± 6.59 at 4 weeks. The average HDRS scores for the sham rTMS group were 20.03 ± 7.40 at baseline, 19.36 ± 6.86 at 2 weeks, and 18.53 ± 7.10 at 4 weeks ( F = 5.98; p < 0.01). The Clinical Global Impression-Severity Scale (CGI-S) scores were significantly lower in the second and fourth weeks than the baseline due to the significant interaction between time effects and the groups ( F = 9.95, p = 0.002). This condition was also similar to the CGI-Improvement Scale and Brief Illness Perception Questionnaire (Brief IPQ), and the intervention group showed a significantly lower score than the control group ( p < 0.05). Conclusions This study showed that rTMS using the employed protocol was promising for patients with MDD resistant to first-line drug therapy. Further studies are required to ensure our observation. Trial registration Trial registration number: IRCT20190612043877N1 Trial registry Record URL: https://irct.behdasht.gov.ir/trial/63919
Javadi et al. (Sun,) studied this question.