Table 1.

Baseline characteristics of depressive risk group versus no depressive risk group (n = 3434)

Variable	No depressive risk (n = 2567)	Depressive risk (n = 867)	P value
Sex			P < 0.001
Male	1355 (52.8)	365 (42.1)
Female	1212 (47.2)	502 (57.9)
Age			P = 0.010
20-39	770 (30.0)	235 (27.1)
40-59	802 (31.2)	319 (36.8)
60-	995 (38.8)	313 (36.1)
Race/ethnicity			P = 0.003
Mexican American	295 (11.5)	99 (11.4)
Other Hispanic	209 (8.1)	78 (9.0)
Non-Hispanic White	981 (38.2)	385 (44.4)
Non-Hispanic Black	589 (22.9)	179 (20.6)
Other race including multi-racial	493 (19.2)	126 (14.5)
Education			P < 0.001
≤ High school	979 (38.1)	419 (48.3)
	1588 (61.9)	448 (51.7)
PIR			P < 0.001
< 1	374 (14.6)	224 (25.8)
1-2	675 (26.3)	281 (32.4)
2-3	412 (16.0)	137 (15.8)
> 3	1106 (43.1)	225 (26.0)
Marital status			P = 0.057
Married	2145 (83.6)	700 (80.7)
Never married	422 (16.4)	167 (19.3)
Drinking status			P = 0.001
Yes	2327 (90.7)	817 (94.2)
No	240 (9.3)	50 (5.8)
Smoking status			P < 0.001
Yes	400 (15.6)	241 (27.8)
No	640 (30.0)	224 (25.8)
Unspecified	1527 (59.5)	402 (46.4)
BMI			P < 0.001
< 18.5	33 (1.3)	20 (2.3)
18.5-24.9	755 (29.4)	194 (22.4)
25-29.9	882 (34.4)	253 (29.2)
≥ 30	898 (35.0)	400 (46.1)
Diabetes			P = 0.001
Yes	342 (13.3)	154 (17.8)
No	2225 (86.7)	713 (82.2)
Hypertension			P = 0.629
Yes	604 (23.5)	211 (24.3)
No	1963 (76.5)	656 (75.7)
Vitamin C intake (mg/d)			P = 0.019
< 75 mg/d women	1380 (53.8)	506 (58.4)
< 90 mg/d men
≥ 75 mg/d women	1187 (46.2)	361 (41.6)
≥ 90 mg/d men
Serum vitamin C (μmol/L)			P < 0.001
< 23 μmol/L	428 (17.7)	214 (24.7)
≥ 23 μmol/L	2139 (83.3)	653 (75.3)