Table 1.

Scoring criteria for each biomarker to derive the score of oxidative stress (SOS)

Biomarkers	Value > ULN	Value < LLN
Antioxidant enzymes
T-GST	-1	+1
TS-GST	-1	+1
%TS-GST	-1	+1
SOD -	1	+1
CAT	-1	+1
GR	-1	+1
GPx	-1	+1
GSH, GSSH, GSSG/GSH
GSH erythrocytes	-1	+1
GSSG erythrocytes	+1	-1
GSSG/GSH erythrocytes	+1	-1
GSH plasma	-1	+1
GSSG plasma	+1	-1
GSSG/GSH plasma	+1	-1
Lipid peroxidation products
TBARS erythrocytes	+1	-1
TBARS plasma	+1	-1
Oxidisability measurements
HT	+1	-1

-1: antioxidant status; +1: oxidative stress; 0: antioxidant pro-oxidant equilibrium; ULN: upper limit of normal; LLN: lower limit of normal