Fig. 2From: Plasma inflammatory cytokines and treatment-resistant depression with comorbid pain: improvement by ketamineChange in the sensory index, affective index, and present pain intensity in the pain group and non-pain group. Legend: *significant difference at a given time point between the pain group and the non-pain group according to the post hoc analysis (P < 0.05). PPI, present pain intensityBack to article page