表 3.
妇女围受孕期服用营养增补剂与孕早期血清Vit.E浓度的关系
Nutritional supplements use during periconceptional period and its relationship with serum Vit.E concentration among the women in the 1st trimester of gestational period
| Use of nutritional supplements | n (%) | Vit.E concentration/(mg/L), median (P25-P75) | Mann-Whitney U test, P | Adjusted βa |
| 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 (7.7) | 9.9 (8.7-11.5) | 0 | |
| FA | 8 133 (36.7) | 9.9 (8.6-11.3) | 0.205 | -0.031 |
| MM | 12 328 (55.6) | 10.3 (8.9-11.8) | < 0.001 | 0.375# |
| Supplements formula | < 0.001 | |||
| FA | 8 133 (39.7) | 9.9 (8.6-11.3) | 0 | |
| MM | 12 328 (60.3) | 10.3 (8.9-11.8) | 0.406# | |
| Timing of supplementation initiation | ||||
| FA | 0.037 | |||
| Before the conception | 5 091 (62.6) | 9.9 (8.7-11.3) | 0 | |
| After the conception | 3 042 (37.4) | 9.8 (8.6-11.2) | -0.165# | |
| MM | 0.007 | |||
| Before the conception | 5 331 (43.2) | 10.3 (9.0-11.9) | 0 | |
| After the conception | 6 997 (56.8) | 10.3(8.9-11.8) | -0.155# | |
| Frequency (in 10 d) | ||||
| FA | 0.084 | |||
| Irregular(< 8 d) | 3 569 (43.9) | 9.8 (8.6-11.2) | 0 | |
| Regular(≥8 d) | 4 564 (56.1) | 9.9 (8.7-11.4) | 0.144* | |
| MM | 0.003 | |||
| Irregular(< 8 d) | 7 555 (61.3) | 10.3 (8.9-11.8) | 0 | |
| Regular(≥8 d) | 4 773 (38.7) | 10.3 (9.0-11.9) | 0.152# | |