Table 2.

Progression Categories for Coronary Artery Calcium (CAC) and Aorta Calcium (AC) in Women with SLE (cases) and Controls from the Study of Lupus Vascular and Bone Long-term Endpoints (2002-present), Chicago, IL

		Low without Progression (N(%))	Low with Progression (N(%))	High to Low (N(%))	High without Progression (N(%))	High with Progression (N(%))	Relative Risk (95% CI)
CAC	Cases (N=149)	106 (71.1)	14 (9.4)	2 (1.3)	14 (9.4)	13 (8.7)	1.77 (1.03–3.05)
	Controls (N=124)	101 (81.5)	10 (8.1)	3 (2.4)	4 (3.2)	6 (4.8)
AC	Cases (N=113)	71 (62.8)	15 (13.3)	4 (3.5)	6 (5.3)	17 (15.0)	1.57 (0.97–2.53)
	Controls (N=122)	88 (72.1)	10 (8.2)	2 (1.6)	10 (8.2)	12 (9.8)

Low CAC defined as < 10 Agatston units, low AC defined as < 100 Agatston units. High CAC defined as ≥ 10 Agatston units, high AC defined as ≥ 100 Agatston units.

Progression definition:

If CAC = 0 Agatston units at baseline, progression was defined as CAC > 0 Agatston units at follow-up. If 0 < CAC < 100 Agatston units at baseline, progression was defined as an annualized change of ≥ 10 Agatston units at follow-up. If CAC ≥ 100 Agatston units at baseline, progression was defined as an annualized percent change ≥ 10% at follow-up. If AC = 0 Agatston units at baseline, progression was defined as AC > 0 Agatston units at follow-up. If 0 < AC < 1000 Agatston units at baseline, progression was defined as an annualized change of ≥ 100 Agatston units at follow-up. If AC ≥ 100 Agatston units at baseline, progression was defined as an annualized percent change ≥ 10% at follow-up.

Relative Risks were calculated as the ratio of the proportion of all cases who progressed and the proportion of all controls who progressed.