Table 4.

Multivariate linear regression models for predicting the determinants of the plasma homocysteine and cysteine levels ^a

	Homocysteine (μmol/L)						Cysteine (μmol/L)
	Model 1		Model 2		Model 3		Model 1		Model 2		Model 3
Characteristics	β b	P c	β b	P c	β b	P c	β b	P c	β b	P c	β b	P c
Age (y)	0.06	0.03	0.02	0.47	0.03	0.30	0.01	0.88	0.01	0.91	0.01	0.90
Sex	0.03	0.29	0.05	0.08	0.05	0.12	0.01	0.75	0.01	0.75	0.02	0.52
BMI, kg/m2	0.05	0.08	0.04	0.16	0.05	0.09	0.01	0.79	0.01	0.88	0.01	0.89
Total energy intake, MJ/d	0.03	0.23	0.02	0.34	0.03	0.25	0.02	0.53	-0.01	0.81	0.01	0.84
Total fat intaked	0.02	0.48	0.02	0.60	-0.01	0.63	-0.03	0.35	-0.03	0.39	-0.02	0.53
Total protein intaked	0.20	<0.001	0.39	<0.001	0.40	<0.001	0.13	0.001	0.12	0.002	0.12	0.002
Animal protein intaked	0.35	<0.001	0.31	<0.001	0.33	<0.001	0.10	0.001	0.09	0.003	0.10	0.003
Plant protein intaked	-0.19	<0.001	-0.28	<0.001	-0.35	<0.001	-0.03	0.37	-0.02	0.68	-0.01	0.76
Folate, nmol/L			-0.17	<0.001	-0.16	<0.001			-0.09	0.006	-0.09	0.007
PLP, nmol/L			0.03	0.37	0.03	0.24			-0.05	0.10	-0.05	0.09
Vitamin B12, pmol/L			-0.19	<0.001	-0.15	<0.001			0.05	0.08	0.05	0.13
Triglycerides, mmol/L					0.01	0.93					0.04	0.30
Total cholesterol, mmol/L					-0.03	0.59					-0.05	0.11
LDL cholesterol, mmol/L					0.07	0.17					0.01	0.80
HDL cholesterol, mmol/L					-0.01	0.91					-0.02	0.63
Fasting plasma glucose, mmol/L					0.01	0.94					-0.05	0.11
Creatinine, μmol/L					0.12	<0.001					0.03	0.30

^aAll variables in each model were entered simultaneously.

^bβ values are standardized coefficients.

^cBold P values are statistically significant.

^d% of total energy intake.