An alternative method for quantifying coronary artery calcification: the multi-ethnic study of atherosclerosis (MESA)

Table 4 Reproducibility of SWCS and AS

	Participants with AS > 0 for at least one scan (n = 3102)		Participants with AS > 0 for both scans (n = 2849)
Variable	Median	Mean	Median	Mean
% Change in SWCS	16.87	31.23	15.30	24.71
% Change in AS	18.29	41.52	16.26	27.38
% Change in AS minus	2.02 (1.66-2.40)*	10.31 (9.05, 11.56)*	1.05 (0.74-1.51)*	2.68 (1.99-3.36)*
% Change in SWCS

*P<0.001. P-values based on paired t-test for mean and Wilcoxon test for median.

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