Participants
head movements
BRAIN
Forty-seven participants were included in the rMDD group, among whom 19 were lost to follow-up from address change, lost contact, or personal reasons. Seven of the original participants relapsed during follow-up and 21 completed the six-month follow-up. Among these, 4 were later removed due to head movements during MRI, leaving a final 17 participants for inclusion in analyses (7 male, 10 female). Twenty-two healthy controls (HCs) were also included (14 males, 8 females).This study was approved by the medical ethics committee of the Brain Hospital affiliated with Nanjing Medical University (ethical approval number: 2015-ky002). All participants participated voluntarily and had signed written informed consent.