A Simple Model to Assess the Probability of Invasion in Ductal Carcinoma In Situ of the Breast Diagnosed by Needle Biopsy

Table 2

Specific score numbers for variables used in the predictive model; the total score in an individual case is the sum of the corresponding specific score numbers.

Category of the variable	Specific score number
Suspected (micro)invasion in the biopsy specimen	13.3
The lesion is visible on ultrasonography	10.6
The size of the lesion on mammography >30 mm	9.2
The lesion is palpable	9.2