Table 2.

Comparison of Imaging and Pathology Measurements of the Span of ILC

	ILC Span, Mean ± SD		Absolute Difference, mm			Relative Difference, %			Agreement
Modality	Imaging	Path	Mean (95% CI)	P-valuea	LoA	Mean (95% CI)	P-valuea	LoA	ICC (95% CI)
MRI	32 ± 27	31 ± 24	1.6 (−1.8, 4.9)	0.36	−24, 27	10.3 (−1.6, 22.1)	0.088	−76, 96	0.88 (0.80, 0.93)
MG/US	23 ± 17	31 ± 24	−7.8 (−12.5, –3.2)	0.001	−43, 27	−16.4 (−26.8, –5.9)	0.003	−92, 59	0.61 (0.38, 0.76)

Abbreviations: CI, confidence interval; ICC, intraclass correlation coefficient; ILC, invasive lobular carcinoma; LoA, limits of agreement; MG, mammography.

^aTest of mean difference = 0 using paired t-test.