表 5.

妇女围受孕期服用营养增补剂与孕早期血清Vit.E浓度≥11.2 mg/L的关系

The association between taking nutritional supplements during periconceptional period and the risk of serum Vit.E concentration ≥11.2 mg/L in the 1st trimester of gestational period among the women

Use of nutritional supplements	n	Vit.E concentration ≥11.2 mg/L, n(%)	Crude OR (95%CI)	Adjusted OR (95%CI)a
a，the confounding factors adjusted in the multivariate Logistic regression model include: delivery year, age, education level, household registration, occupation, pre-pregnancy body mass index, parity. FA, folic acid only; MM, multiple micronutrients. *P < 0.05; #P < 0.001.
Nutritional supplements
No-use	1 710	495 (28.9)	1	1
FA	8 133	2 212 (27.2)	0.92 (0.82-1.03)	0.99 (0.88-1.12)
MM	12 328	4 289 (34.8)	1.31 (1.17-1.46)#	1.36 (1.21-1.53)#
Supplements formula
FA	8 133	2 212 (27.2)	1	1
MM	12 328	4 289 (34.8)	1.43 (1.34-1.52)#	1.39 (1.31-1.48)#
Timing of initiation
FA
Before the conception	5 091	1 422 (27.9)	1	1
After the conception	3 042	790 (26.0)	0.91 (0.82-1.00)	0.86 (0.77-0.96)*
MM
Before the conception	5 331	1 943 (36.4)	1	1
After the conception	6 997	2 346 (33.5)	0.88 (0.82-0.95)*	0.88 (0.81-0.95)*
Frequency (10 in days)
FA
Irregular(< 8 d)	3 569	930 (26.1)	1	1
Regular(≥8 d)	4 564	1 282 (28.1)	1.11 (1.00-1.22)*	1.16 (1.05-1.29)*
MM
Irregular(< 8 d)	7 555	2 547 (33.7)	1	1
Regular(≥8 d)	4 773	1 742 (36.5)	1.13 (1.05-1.22)*	1.13 (1.04-1.22)*