Table 1. Genotype distribution in professional athletes, elite endurance athletes, professional football players and non-athletes of liver metabolism polymorphisms.

Symbol	Gene	Polymorphism	dbSNP	Genotype Score	Professional athletes	Elite endurance athletes	Professional football players	Elite Endurance athletes vs. Professional football players p-value	non-athletes	Professional athletes vs. non-athletes p-value	Elite endurance athletes vs. non-athletes p-value	Professional football players vs. non-athletes p-value
CYP2D6	cytochrome P450 family 2 subfamily D member 6	c.506-1G>A	rs3892097	2 = GG	272 (93.2%)	142 (88.8%)	130 (98.5%)	0.002	98 (61.1%)	< 0.001	< 0.001	<0.001
				1 = GA	18 (6.2%)	17 (10.6%)	1 (0.8%)		59 (37.0%)
				0 = AA	2 (0.7%)	1 (0.6%)	1 (0.8%)		3 (1.9%)
GSTM1	glutathione-S transferase mu isoform 1	"Null" polymorphism		1 = +	121 (41.4%)	59 (36.9%)	62 (47.0%)	0.081	57 (35.7%)	0.389	0.999	0.104
				0 = -	171 (58.6%)	101 (63.1%)	70 (53.0%)		103 (64.3%)
GSTP	glutathione S-transferase pi	c.313A>G	rs1695	2 = AA	147 (50.3%)	91 (56.9%)	56 (42.4%)	0.014	80 (50.0%)	0.975	0.306	0.423
				1 = GA	116 (39.7%)	59 (36.9%)	57 (43.2%)		64 (39.9%)
				0 = GG	29 (10.0%)	10 (6.3%)	19 (14.4%)		16 (10.1%)
GSTT	glutathione S-transferase theta	+/-		2 = +/+	123 (42.1%)	72 (45.0%)	51 (38.6%)	<0.001	64 (40.0%)	0.205	0.779	0.003
				1 = +/-	89 (30.5%)	34 (21.3%)	55 (41.7%)		39 (24.4%)
				0 = -/-	80 (27.4%)	54 (33.8%)	26 (19.7%)		57 (35.6%)