Table 1.

Variables used for depression detection.

Variable name	Variable description	Possible values/ranges
ACE	Angiotensin converting enzyme haplotype	1, 2, 3
8-u-isoprostane	8-u-Isoprostane	0.06–84.21
8-OHdG	8-Hydroxydeoxyguanosine	3.08–850.02 pg/ml
GSH	Glutathione	317.25–4336.47 mg/100 ml
GSSG	Oxidized glutathione	37.37–1518.43 mg/100 ml
GSH-GSSG-r	Oxidized glutathione:glutathione ratio	0.72–22.55
Depression Med	Whether the participant takes antidepression medication	Yes, No
DM-Status	Whether the participant has diabetes	Yes , No
DM-MedUse	Whether the participant takes diabetes medication	Yes , No
HT-Status	Whether the participant is suffering from hypertension	Yes , No
HT-MedUse	Whether the participant takes hypertension medication	Yes , No
CVD	Whether the participant is suffering from cardiovascular illness	Yes, No
Age	Age range of the participant	25–96 years
Gender	Gender of the participant	Male, Female
Depression	The patient health questionnaire score (PHQ-score)	0–24