Table 4. Publication bias assessment of Gly allele comparisons with significant outcomes favoring sports performance.

		Egger's regression asymmetry test
	n	Intercept	P-value
All PRO	16	-1.15	0.25
All PSO	13	0.23	0.78
Endurance PRO	11	-0.84	0.52
Caucasian PRO	13	-0.93	0.39
Caucasian PSO	11	0.00	1.00

PRO: pre-outlier; PSO: post-outlier; n: number of studies; non-significant P-values (> 0.05) indicate absence of evidence of publication bias