Table 1.

Correlation coefficients for the relationships between levels of circulating anti-Hsp60, anti-Hsp70, and anti-Hsp90 IgG, IgM, and IgA autoantibodies and selected parameters of RA patients including disease activity (DAS 28), Steinbrocker radiographic criteria (RTG), rheumatoid factor (RF), and serum cytokine levels. P values ≤ 0.05 were considered significant

	DAS 28	RTG	RF	IFN-ɣ	TNF-α	IL-4
IgG
Anti-Hsp60	− 0.081	0.339	0.267	0.253	0.117	0.328
	P = 0.622	P = 0.058	P = 0.188	P = 0.121	P = 0.479	P = 0.042
Anti-Hsp70	− 0.004	− 0.220	− 0.111	0.113	− 0.022	− 0.005
	P = 0.982	P = 0.226	P = 0.590	P = 0.493	P = 0.896	P = 0.977
Anti-Hsp90	− 0.277	− 0.249	− 0.085	0.372	0.183	0.147
	P = 0.088	P = 0.169	P = 0.681	P = 0.020	P = 0.264	P = 0.373
IgM
Anti-Hsp60	0.179	0.093	0.199	− 0.073	− 0.161	− 0.290
	P = 0.297	P = 0.633	P = 0.363	P = 0.673	P = 0.349	P = 0.086
Anti-Hsp70	0.142	0.047	0.121	− 0.213	− 0.353	− 0.273
	P = 0.409	P = 0.809	P = 0.582	P = 0.212	P = 0.035	P = 0.107
Anti-Hsp90	− 0.076	− 0.046	0.087	0.006	− 0.184	− 0.307
	P = 0.660	P = 0.811	P = 0.694	P = 0.971	P = 0.282	P = 0.068
IgA
Anti-Hsp60	0.050	0.245	0.390	0.014	− 0.049	0.175
	P = 0.785	P = 0.210	P = 0.089	P = 0.971	P = 0.790	P = 0.339
Anti-Hsp70	0.102	0.182	0.390	− 0.156	− 0.075	− 0.018
	P = 0.579	P = 0.353	P = 0.089	P = 0.394	P = 0.685	P = 0.921
Anti-Hsp90	0.047	0.248	0.477	− 0.095	− 0.035	− 0.037
	P = 0.796	P = 0.203	P = 0.033	P = 0.603	P = 0.850	P = 0.840