The association between brain-derived neurotrophic factor gene polymorphism and migraine: a meta-analysis

Table 3 Heterogeneity among included studies with Chi squared-based Q-test and I² test

rs number	Studies	W Vs M (allele model)		WW + WM Vs MM (dominant model)		WW Vs WM + MM (recessive model)		WW Vs MM (additive model)		WW Vs WM (additive model)
rs number	Studies	p	I²	p	I²	p	I²	p	I²	p	I²
rs6265(G/A)	5	0.72	0%	0.94	0%	0.78	0%	0.92	0%	0.84	0%
rs2049046(A/T)	4	0.41	0%	0.24	29%	0.72	0%	0.40	0%	0.76	0%

Abbreviation: W wild allele, M mutant allele, WW wild homozygote, WM heterozygote, MM mutant homozygote

ISSN: 1129-2377