Table 4. Antibodies (Ab) to carbamylated BSA (CarBSA) are associated to a worse skin involvement.

Outcome variable	Age group	Predictor retained in the model	B	SE	p	OR	95% CI for OR
mRss	Any	Ab to CarBSA	-2.91	1.06	0.006	0.05	0.070–0.430
	<67	Ab to CarBSA	-2.70	1.14	0.018	0.07	0.007–0.630
Scleredema	Any	Ab to CarBSA	-3.20	0.76	<0.001	0.04	0.010–0.220
		Disease duration	-2.40	0.80	0.002	0.09	0.020–0.420
	<67	Ab to CarBSA	-3.00	0.88	0.001	0.05	0.010–0.281
		Disease duration	-2.24	0.84	0.008	0.10	0.020–0.554

CI, confidence interval; mRss, modified Rodnan skin score; OR, odds ratio; SE, standard error. A p<0.05 was considered statistically significant.