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Table 2 Correlation coefficients between B vitamins intake and plasma homocysteine levels according to AD, MCI and normal groups

From: Association between intake of B vitamins and cognitive function in elderly Koreans with cognitive impairment

  All (n = 321) Homocysteine (μmol/L)
AD (n = 100) MCI (n = 100) Normal (n = 121)
Energy (kcal/d)     
 Diet only −0.040 0.126 0.166 −0.072
 Total −0.040 −0.113 0.062 −0.084
Protein (g/d)     
 Diet only −0.012 0.125 −0.063 0.010
 Total −0.065 0.125 −0.063 0.010
Vitamin B2 (mg/d)     
 Diet only −0.172** 0.069 −0.204 0.053
 Total −0.185*** −0.182 −0.208* −0.133
Vitamin B6 (mg/d)     
 Diet only −0.168** 0.075 0.098 0.015
 Total −0.183** −0.216* −0.130 −0.141
Vitamin B12 (μg/d)     
 Diet only −0.115* −0.111 −0.053 −0.019
 Total −0.127* −0.173 0.069 −0.143
Folate (μg DFE/d)     
 Diet only −0.036 −0.093 0.102 −0.031
 Total −0.151** −0.121 −0.104 −0.063
  1. Data on intake and plasma level are log transformed. Adjusted for age, sex, BMI, marital status, education, current smoking, energy intake(ln), thyroid disease and vascular risk factors (hypertension, diabetes mellitus, dyslipidemia, stroke and cardiovascular disease) as covariates (*p < 0.05, **p < 0.01, ***p < 0.001).