Table 3.

Multivariate Logistic Regression Analyses for Predicting the Probability of Excellent Pathologic Response After Neoadjuvant Chemotherapy With or Without the Continuous GGI

Variable	Analysis Without Continuous GGI			Analysis With Continuous GGI
	OR	95% CI	P	OR	95% CI	P
Age, > 50 v ≤ 50 years	0.88	0.47 to 1.64	.692	0.94	0.50 to 1.77	.839
ER status, positive v negative	0.34	0.16 to 0.72	.004	0.43	0.20 to 0.91	.028
Nodal status, positive v negative	0.35	0.17 to 0.72	.005	0.32	0.16 to 0.68	.003
Grade, 3 v 1 or 2	3.33	1.51 to 7.33	.003	2.26	0.97 to 5.24	.059
T stage, 2 or 3 v 1	0.85	0.43 to 1.67	.635	0.81	0.40 to 1.62	.550
Continuous GGI*	—	—	—	1.86	1.15 to 3.00	.011

NOTE. Likelihood ratio test for the comparison between the analysis with and without the GGI: P = .008 and χ² = 6.93.

Abbreviations: GGI, genomic grade index; OR, odds ratio; ER, estrogen receptor.

^*GGI used as a continuous covariate.