Table 4. Relationship of fecal Synergistetes and IL-6 serum levels with anti-PC and total IgM and IgG antibodies.

	Synergistetes		IL-6
	HC	SLE	HC	SLE
IgM:
anti-PC	r = 0.404	r = 0.624*	r = −0.004	r = −0.473
	p = 0.062	p = 0.002	p = 0.986	p = 0.030
total	r = 0.101	r = 0.824*	r = 0.081	r = −0.642*
	p = 0.662	p < 0.001	p = 0.729	p = 0.002
IgG:
anti-PC	r = −0.156	r = 0.239	r = −0.049	r = −0.038
	p = 0.523	p = 0.286	p = 0.842	p = 0.286
total	r = −0.301	r = −0.078	r = 0.133	r = 0.332
	p = 0.211	p = 0.737	p = 0.586	p = 0.142
IgM/IgG ratio:
anti-PC	r = 0.670	r = 0.495*	r = −0.005	r = −0.488
	p = 0.002	p = 0.023	p = 0.983	p = 0.025
total	r = 0.496	r = 0.597*	r = −0.082	r = −0.610*
	p = 0.031	p = 0.004	p = 0.737	p = 0.003

Correlation analyses were evaluated by Spearman test and confirmed by multivariate linear regression analyses adjusted by weight, BMI and blood lipids (*p < 0.05, R² > 0.6).