rMDD: Major depressive disorder in remission—GPx: Glutathion Peroxydase—SOD: Superoxide dismutase (information about isoform was not provided)—MDA: Malondialdehyde—TBARS—Thiobarbituric Acid-Reactive Substances—8-OHdG: 8-hydroxy-2′-deoxyguanosine—↗: Values significantly higher in depressed patients compared to controls—↘: Values significantly lower in depressed patients compared to controls—↔: No significant difference between depressed patients and controls. Here, SOD1 is linked to major depressive disorder.