Demographics and clinical characteristic of patients with MDD and healthy controls.

HRSD, Hamilton Rating Scale for Depression. TRD, treatment-resistant depression; TSD, treatment-sensitive depression; HC, healthy controls; plus-minus values are Mean±SD.aThe P value for gender distribution in the three groups was obtained by chi-square test.bThe P values were obtained by one-way analysis of variance tests.cThe P values were obtained by two sample t-test.