Table 4.

Changes of systolic and diastolic blood pressure of the participants by GSTM1 or GSTT1 genotype after 8 weeks of grape juice supplementation

	All participant (n = 95)	GSTM1 genotype		GSTT1 genotype
		Present (n = 39)	Null (n = 56)	Present (n = 34)	Null (n = 61)
SBP
0 week	123.5 ± 1.3	122.6 ± 2.1	124.2 ± 1.6	125.7 ± 2.4	122.3 ± 1.5
8 weeks	125.9 ± 1.4	125.1 ± 2.3	126.5 ± 1.8	124.0 ± 2.2	127.0 ± 1.8*
DBP
0 week	80.5 ± 1.0	79.4 ± 1.5	81.2 ± 1.4	81.1 ± 1.7	80.1 ± 1.3
8 weeks	76.9 ± 1.0*	77.6 ± 1.6	76.5 ± 1.4*	76.3 ± 1.6*	77.3 ± 1.4*

All values are means ± SE. SBP: systolic blood pressure; DBP: diastolic blood pressure. *Statistical significance at p<0.05 after paired t test.