Table 4. Effects of plasma lipid, plasma betaine and age on correlations.
| Above median betaine excretion | Below median betaine excretion | |
| A. Correlations between plasma homocysteine and urine betaine excretion | ||
| Above median non-HDL-cholesterol | +0.20 (0.045) | −0.26 (0.012) |
| Below median non-HDL-cholesterol | +0.01 (0.96) | −0.09 (0.38) |
| Above median age | +0.11 (0.29) | −0.23 (0.023) |
| Below median age | +0.08 (0.44) | −0.04 (0.69) |
| Above median plasma betaine | +0.11 (0.28) | −0.24 (0.018) |
| Below median plasma betaine | +0.01 (0.90) | −0.05 (0.60) |
| B. Correlations between plasma homocysteine and plasma betaine | ||
| Above median non-HDL-cholesterol | −0.26 (0.011) | −0.04 (0.72) |
| Below median non-HDL-cholesterol | +0.06 (0.57) | −0.01 (0.96) |
| Above median age | −0.19 (0.062) | −0.10 (0.34) |
| Below median age | −0.01 (0.93) | −0.04 (0.68) |
| Above median plasma betaine | +0.14 (0.18) | +0.08 (0.41) |
| Below median plasma betaine | −0.26 (0.010) | −0.02 (0.87) |
| C. Correlations between plasma betaine and betaine excretion | ||
| Above median non-HDL-cholesterol | −0.21 (0.044) | +0.09 (0.37) |
| Below median non-HDL-cholesterol | −0.04 (0.72) | +0.03 (0.74) |
| Above median age | −0.08 (0.45) | +0.00 (1.00) |
| Below median age | +0.03 (0.76) | +0.01 (0.93) |
| Above median plasma betaine | +0.20 (0.053) | +0.23 (0.023) |
| Below median plasma betaine | −0.14 (0.16) | −0.09 (0.35) |
Values are Pearson correlation coefficients between log-transformed variables, with significance (p) in parentheses after correlations. Significant correlations (p<0.05) in bold. Gender corrected plasma betaine. Urine betaine excretion measured as mmol betaine/mole creatinine. n = 101 (97 for plasma betaine).