A Cross-Sectional Study of the Association between Autoantibodies and Qualitative Ultrasound Index of Bone in an Elderly Sample without Clinical Autoimmune Disease

Table 9

Association between quantitative ultrasound index (QUS index) and the coexpression of more than one autoantibody (for available cases).

Autoantibody	Correlation coefficient	95% confidence interval	value	N pos
ANA + ENA	−0.67	−1.57; 0.23	0.144	10/1625 (1%)
ANA + ANCA	−0.12	−0.48; 0.23	0.497	72/1628 (4%)
ANA + TPO	−0.30	−0.79; 0.19	0.227	40/1628 (2%)
ANA + RHF	1.11	−0.53; 2.75	0.183	5/1589 (7%)
ANA + TTG	−0.35	−0.99; 0.29	0.283	24/1628 (1%)
ANA + ACGA	−0.04	−0.48; 0.39	0.850	46/1626 (3%)
ANCA + ENA	−0.22	−1.50; 1.05	0.729	5/1619 (0.3%)
ANCA + TTG	0.23	−0.78; 1.23	0.655	10/1628 (1%)
ANCA + ACGA	−0.84	−1.53; −0.15	0.017	18/1619 (1%)
ANCA + TPO	−0.38	−1.07; 0.31	0.283	21/1627 (1%)
ANCA + RHF	1.81	−1.03; 4.65	0.211	2/1609 (0.1%)
TPO + TTG	−0.85	−1.63; −0.06	0.036	15/1628 (1%)
TPO + ACGA	0.17	−0.52; 0.87	0.621	21/1625 (1%)
ANA + ANCA + TPO	−0.64	−1.50; 0.21	0.141	12/1628 (1%)
ANA + TPO + ACGA	−0.37	−1.53; 0.79	0.533	7/1627 (0.4%)