Table 5.

Probability of NAC involvement by logistic regression model^a

Tumor location	HER2	Nuclear G	Probability (%)
1 quadrant	−	1	1.7
1 quadrant	−	2	2.0
1 quadrant	−	3	3.2
1 quadrant	+	1	ND
1 quadrant	+	2	4.3
1 quadrant	+	3	6.9
2 quadrants	−	1	5.6
2 quadrants	−	2	6.5
2 quadrants	−	3	10.2
2 quadrants	+	1	11.5
2 quadrants	+	2	13.4
2 quadrants	+	3	20.2
3 quadrants	−	1	ND
3 quadrants	−	2	6.1
3 quadrants	−	3	9.6
3 quadrants	+	1	ND
3 quadrants	+	2	12.6
3 quadrants	+	3	19.1
4 quadrants	−	1	31.4
4 quadrants	−	2	35.1
4 quadrants	−	3	47.0
4 quadrants	+	1	ND
4 quadrants	+	2	ND
4 quadrants	+	3	66.3
Central	−	1	14.2
Central	−	2	16.4
Central	−	3	24.2
Central	+	1	ND
Central	+	2	30.3
Central	+	3	41.5

ND no data (the data set does not include this kind of cancer, so its probability cannot be predicted)

^a1xbeta = (−4.0670 + location + HER2 + nuclear grade); probability of NAC involvement = [exp(xbeta)/(1 + exp(xbeta))]