To determine whether lifetime MDD findings were due to depression status, analogous mixed model analyses were performed for three groups: current MDD+ (n = 62), past MDD+ (n = 75), and MDD− (n = 163) (six lifetime MDD+ who met criteria for past MDD and current dysthymia were excluded from analysis). Figure 4 illustrates that a current MDD status by condition interaction emerged for AVG (F(4, 587) = 3.74, p < .05), Cz (F(4, 587) = 3.46, p < .05), and LM (F(4, 587) = 2.94, p < .05), wherein current and past MDD+ exhibited lower relative left frontal activity than MDD− for approach (AVG: d = .32/.25; Cz: d = .31/.32; LM: d = .25/.29) and withdrawal (AVG: d = .60/.31; Cz: d = .63/.41; LM: d = .52/.37) conditions but groups did not differ from each other during the rest condition. In contrast, results for CSD-transformed data indicated that a main effect of current MDD status emerged (F(2,294) = 15.87, p < .001), wherein current and past MDD+ displayed lower relative left frontal activity than MDD− (d = .45/.31) across approach, withdrawal, and rest conditions.
