Table 4

Multivariate linear regression models for predicting the determinants of the plasma homocysteine and cysteine levelsa
Homocysteine (μmol/L) Cysteine (μmol/L)
Model 1 Model 2 Model 3 Model 1 Model 2 Model 3
Characteristics βb Pc βb Pc βb Pc βb Pc βb Pc βb Pc
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.

Xiao et al.

Xiao et al. Nutrition Journal 2013 12:144   doi:10.1186/1475-2891-12-144

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