BloodParameter α-tocoferol, μmol/L P-value Retinol, μmol/L P-value
  <12 μmol/L (n=36) (1) 12-42 μmol/L (n=17) (2)   <1.05 μmol/L (n=35) (3) 1.05-2.8 μmol/L (n=18) (4)  
CDs (μmol/L) 1.8 ± 0.9 1.3 ± 0.7 0.043* 1.6 ± 0.9 1.6 ± 1.0 0.949
TBARs (μmol/L) 1.03 ± 0.7 0.9 ± 0.5 0.479 1.0 ± 0.7 0.9 ± 0.6 0.820
Table 4: Groups Differences of Oxidative Stress Parameters. All values are mean ± SD. * - significant differences.