No genetic causal association between periodontitis and ankylosing spondylitis: a bidirectional two-sample mendelian randomization analysis

Table 2 The heterogeneity and horizontal pleiotropy of individual SNPs

		Heterogeneity
		MR-Egger			IVW
Exposure	Outcome	Q	df	P-value	Q	df	P-value
AS	PD	38.54	30	0.14	38.55	31	0.17
PD	AS	8.71	14	0.85	8.71	15	0.89
		MR-Egger test for horizontal pleiotropy
Exposure	Outcome	Intercept		SE		P-value
AS	PD	0.0014		0.0128		0.9160
PD	AS	-4.61E-06		7.46E-05		0.9517

Abbreviations df: degree of freedom; MR: Mendelian randomization; Q: heterogeneity statistic Q

ISSN: 1755-8794