Figure 2. Relationships between potential antioxidant and Nε-hexanoyl-lysine in the vitreous body and serum from proliferative diabetic retinopathy and macular hole patients. In the vitreous body (A) and serum (B), no significant correlations were evident between PAO and HEL levels in MH patients. C: There was a positive correlation between PAO and HEL levels in the vitreous body (r=0.65, p<0.01) in PDR patients. D: The concentrations of PAO and HEL in the serum showed a positive correlation (r=0.55, p<0.05) in PDR patients. Correlations were examined using the Pearson's product-moment correlation coefficient.