Table 2.

Baseline characteristics of participants (N = 2398).

Characteristic	Hyperhomocysteinemia (HHCY)		P value
	No	Yes
N	2370	28
Age (year)	32.16 (31.35, 32.96)	41.14 (38.67, 43.60)	< 0.0001
BMI (kg/m^2)	27.47 (27.01, 27.93)	27.68 (24.02, 31.34)	0.9102
Homocysteine (μmol/L)	6.82 (6.70, 6.94)	20.68 (16.24, 25.11)	< 0.0001
folate, rbc (ng/ml rbc)	273.78 (265.21, 282.35)	223.30 (189.85, 256.75)	0.0109
vitamin b12, serum (pg/ml)	511.56 (476.33, 546.79)	357.71 (287.67, 427.76)	0.0007
folate, serum (ng/ml)	13.27 (12.57, 13.97)	6.00 (3.92, 8.09)	< 0.0001
ferritin (ng/ml)	55.61 (52.33, 58.89)	169.75 (74.49, 265.01)	0.0266
segmented neutrophils percent (%)	59.90 (59.43, 60.37)	64.05 (56.84, 71.26)	0.2665
segmented neutrophils number	4.61 (4.54, 4.68)	4.97 (3.91, 6.03)	0.5186
Race			0.9581
Mexican American	9.39 (6.98, 12.51)	7.05 (2.07, 21.41)
Other hispanic	5.70 (3.82, 8.42)	3.69 (0.31, 32.17)
Non-hispanic white	65.90 (60.70, 70.74)	66.95 (40.06, 86.00)
Non-hispanic black	14.09 (11.19, 17.59)	15.59 (5.40, 37.40)
Other race—including multi-racial	4.93 (3.64, 6.65)	6.72 (0.83, 38.33)
Education level			0.3660
< High school	25.14 (22.42, 28.08)	34.77 (12.33, 66.89)
High school	21.84 (20.16, 23.63)	29.88 (9.52, 63.32)
> High school	53.01 (50.07, 55.93)	35.34 (15.62, 61.76)
Bacterial Vaginosis			0.0006
Negative	61.18 (58.51, 63.78)	25.83 (9.75, 52.90)
Positive	38.82 (36.22, 41.49)	74.17 (47.10, 90.25)

*BMI was calculated as the body weight in kilograms divided by the square of the height in meters;

HHCY: HCY concentration in plasma > 15 μmol/L.

Data in the Table 2, for continuous variables: survey-weighted mean (95% CI), P value was by survey-weighted linear regression (svyglm) ; for categorical variables: survey-weighted percentage (95% CI), P value was by survey-weighted Chi-square test (svytable).