. 2017 Feb 8;60(2):136–142. doi: 10.3164/jcbn.16-45

Table 7.

Associations between early pregnancy biomarker concentrations and head circumference, birth length and birth weight^a

Blood nutrients	Head circumference		Birth length		Birthweight
Blood nutrients	95% CI^b	p value	95% CI^b	p value	95% CI^b	p value
Serum folate (ng/ml)	0.060 (–0.012, 0.031)	0.373	–0.032 (–0.040, 0.024)	0.625	–0.090 (–16.773, 3.192)	0.178
RBC folate (ng/ml)	–0.016 (0.000, 0.000)	0.82	0.197 (0.000, 0.001)	0.003	0.149 (0.017, 0.381)	0.032
Vitamin B₁₂ (pg/ml)	0.464 (0.000, 0.000)	0.464	–0.086 (–0.001, 0.000)	0.169	–0.041 (–0.205, 0.104)	0.523

^aMultivariate linear regression analysis with head circumference, birth length and birthweight as dependent variables and Serum folate, RBC folate and vitamin B₁₂ concentrations as independent variables. ^bAll values in this column are regression coefficients (95% CI) and their corresponding B value.