Table 4. Conditional nalysis of the association of BMD with anti-CarPA and ACPA.

Location	anti-CCP	anti-CarPA (n)a	Coefficient b	SE	p
LS	negative	negative (291)	ref.
		low-positive (23)	-0.17	0.27	0.5
		high-positive (19)	-0.52	0.30	0.09
	positive	negative (101)	-0.25	0.14	0.09
		low-positive (45)	0.06	0.20	0.8
		high-positive (53)	-0.50	0.19	0.007
TH	negative	negative	ref.
		low-positive	-0.27	0.19	0.16
		high-positive	-0.30	0.22	0.17
	positive	negative	-0.10	0.10	0.3
		low-positive	0.10	0.14	0.5
		high-positive	-0.37	0.13	0.005

Only the strongest associations from Table 3 were considered here.

^a Number of patients in each stratum, which are identical for LS and for TH (not shown).

^b Multiple linear regression analysis including as covariates sex, BMI, age at initiation, and menopause status for LS, and the same covariates plus a covariate for disease activity measured with HUPI for TH.