Table 2. Clinicopathological predictors of IC in patients with a preoperative diagnosis of DCIS.

DCIS = ductal carcinoma in situ; IC = invasive carcinoma; OR = odds ratio; CI = confidence interval

Variable	Risk for invasive carcinoma
	Univariate analysis		Multivariate analysis
	OR (95% CI)	P-value	Adjusted OR (95% CI)	P-value
Age
>50	1.411 (0.59-3.38)	0.439
Ultrasound findings
Mass lesion	1.06 (0.31-3.62)	0.92
Size on the mammogram
>20 mm	1.94 (0.52-7.16)	0.321
Mammogram findings
Microcalcification	0.5 (0.15-1.65)	0.252	0.58 (0.169-2.03)	0.397
Multifocality
Yes	3.54 (1.32-9.5)	0.012	3.011 (1.037-8.74)	0.043
Presentation
Symptomatic	1.67 (0.74-3.78)	0.214
Grade
High	1.17 (0.42-3.22)	0.766
Necrosis
Yes	1.71 (0.77-3.82)	0.19	2.037 (0.874-4.75)	0.099