Figure 6.

The relationships between the cognitive function test scores and oxidative stress among K residents. The HDS-R scores of the low 8-OHdG/c group (<11.8 ng/mg) were higher than those of the high 8-OHdG/c group (≥11.8 ng/mg) in the young-old group (≤69 years old) and in the mid-old group (70-79 years old) (a). The MMSE scores of the low 8-OHdG/c group were higher than those of the high 8-OHdG/c group in the mid-old and young-old group (b). The levels of 8-OHdG/c (ng/mg of creatinine) were positively correlated with the hair V contents (ng/mg wet weight) (Pearson’s r=0.56, p<0.05) (c). *: p<0.05, #: p=0.08, &: p=0.1. The plot and bar show the mean value and standard error, respectively. ●: low 8-OHdG/c group, □: high 8-OHdG/c group