a<p>Overall and between-group <i>P</i> values were obtained from linear mixed-effects model analysis and student <i>t</i>-test, respectively.</p><p>MDD, major depressive disorder; n-EA, noninvasive electroacupuncture; DCEAS, dense cranial electroacupuncture stimulation; 95% CI, 95% confidence interval; HAMD-17, 17-item Hamilton Rating Scale for Depression; CGI-S, Clinical Global Impression-Severity; SDS, Self-rating Depression Scale.</p
