Table 2.

Correlations between levels of FCN1 and clinical markers

Category	Clinical marker	n	r	95% CI	P-value
Inflammation	White blood cell count	115	0.39	0.22, 0.53	<0.001
	ESR	72	0.28	0.05, 0.48	0.017
	C-reactive protein	115	0.43	0.27, 0.57	<0.001
	Immunoglobulin G	59	−0.01	−0.27, 0.25	0.93
	Serum amyloid A	31	0.67	0.41, 0.83	<0.001
Liver function	ALT	114	−0.05	−0.23, 0.13	0.13
Renal function	eGFR	113	−0.11	−0.29, 0.08	0.26
	Creatinine	114	0.20	0.02, 0.37	0.034
Complement	Complement factor C3	48	0.52	0.28, 0.70	<0.001
	Complement factor C4	47	0.52	0.27, 0.70	<0.001
	CH50	31	0.30	−0.06, 0.59	0.10
Autoantibody	Rheumatoid factor	50	−0.06	−0.34, 0.22	0.66
	Anti-nuclear antibody	89	−0.04	−0.24, 0.17	0.74
	C-ANCA	51	0.40	0.14, 0.61	0.0039
	P-ANCA	56	0.29	0.03, 0.51	0.031
	ACPA	70	0.25	0.01, 0.45	0.040
	Anti-dsDNA antibody	32	−0.16	−0.49, 0.20	0.37
Coagulation	Fibrinogen	25	0.38	−0.02, 0.67	0.065
	d-dimer	40	0.09	−0.23, 0.39	0.58
Others	Albumin	26	−0.16	−0.51, 0.25	0.45
	Ferritin	43	−0.02	−0.32, 0.28	0.87
	Immune complex	27	−0.30	−0.61 0.09	0.13
	MMP3	66	−0.12	−0.36, 0.12	0.32

n: number; r: Pearson’s correlation coefficient; CI: confidence interval; ESR: erythrocyte sedimentation rate; CH50: 50% hemolytic activity of complement; ACPA: anti-cyclic citrullinated peptide antibody; dsDNA: double-stranded DNA; MMP3: matrix metalloproteinase 3.