Table 3. Concentrations of plasma/serum homocysteine, folate, PLP, vitamin B12 and blood Pb in quartile 1 versus quartile 4 of daily juice consumption.
| Daily Juice Consumption | |||
| Characteristics* | Q1 (n = 453) | Q4 (n = 132) | p value** |
| Homocysteine, µmol/L | 15.3 (10.5)/12.5 (9.4–17.1) | 13 (6.1)/11.7 (9.5–15.0) | 0.01 |
| Folate, ng/mL | 6.7 (4.7)/5.6 (3.4–8.5) | 6.9 (4.5)/5.6 (3.5–8.7) | 0.7 |
| PLP, nmol/L | 32.6 (34.8)/25 (17–35) | 39 (39.4)/30.6 (18.2–46.7) | 0.07 |
| Vitamin-B12, pg/mL | 446 (238)/400 (280–560) | 458 (248)/400 (294–547) | 0.6 |
| Blood Pb, µg/dL | 12.6 (6.6)/11.4 (8.8–14.7) | 9.6 (3.5)/9.85 (7.4–11.4) | <0.001 |
*Values are expressed as mean (SD)/median (IQR).
**p value compares mean values of lowest quartile of intake (Q1) vs highest quartile of intake (Q4) using Independent sample t-test.
Pb = lead.
PLP = pyridoxal phosphate.