Table 3

Multiple linear regression analysis of predictors of serum B₁₂, folate and homocysteine

Variables	Serum B₁₂*		Serum folate		Homocysteine*
Variables	β coefficient	p Value	β coefficient	p Value	β coefficient	p Value
Age	–	NS	–	NS	0.18	0.001
BMI	–	NS	–	NS	–	NS
Smoking	–0.12	<0.05	–	NS	–	NS
Alcohol	–	NS	–	NS	–	NS
Oral contraceptive use	−0.29	<0.001	0.11	<0.05	–	NS
TC:HDL ratio*	–	NS	–	NS	–	NS
Vegetarian or vegan diet	−0.18	<0.01	–	NS	–	NS
B₁₂ supplement use	–	NS	Not included	NA	–	NS
Daily B₁₂ intake*	0.28	<0.001	Not included	NA	–0.16	0.001
Folic acid supplement use	Not included	NA	0.18	<0.01	–	NS
Daily folate intake*	Not included	NA	0.33	<0.001	–	NS
Serum B₁₂*			–	NS	−0.20	<0.001
Serum folate*	–	NS			−0.35	<0.001

*Log transformed for statistical comparison.
–, Tested but not significant in the model;
BMI, body mass index; NA, not applicable; NS, not significant; TC:HDL, total cholesterol:high-density lipoprotein ratio.