Features of dissociation differentially predict antidepressant response to ketamine in treatment-resistant depression.

•Intra-infusion dissociation is associated with antidepressant response to ketamine.•Antidepressant response may be uniquely related to dissociative symptom clusters.•Depersonalization was globally associated with antidepressant response.•Derealization was discriminately associated with antidepressant response.