TAC1 and major depressive disorder: Other AUCs for discriminating patients from controls which showed good levels of discrimination above 0.80 included: oxytocin in FES vs. HC [AUC = 0.80, 95% CI 0.68–0.89; Figure 2C]; oxytocin in MDD vs. HC [AUC = 0.85, 95% CI 0.74–0.92; Figure 2C]; a-MSH in MDD vs. HC [AUC = 0.80, 95% CI 0.68–0.89; Figure 2C]; and substance P in MDD vs. HC [AUC = 0.84, 95% CI 0.74–0.92; Figure 2C].