Table 2.

Univariate and multivariate Cox regression analyses of factors associated with overall survival in triple-negative breast cancer.

Variable		Univariate			Multivariate
		HR	95% CI	P value	HR	95% CI	P value
Age	≤50 vs >50	1.508	0.935–2.434	0.092	1.529	0.887–2.636	0.127
BMI	≤24 vs >24	1.285	0.837–1.973	0.252
Location	Left vs right	1.015	0.663–1.553	0.945
Differentiation	III vs I + II	1.181	0.706–1.978	0.526
T-stage				0.000			0.038
	pT2 vs pT1	2.924	1.827–4.680	0.000	1.947	1.167–3.251	0.011
	pT3 vs pT1	2.061	0.488–8.704	0.325	1.359	0.310–5.967	0.684
Multifocality	Yes vs no	2.144	0.864–5.323	0.100	1.830	0.733–4.569	0.196
N-stage				0.000			0.000
	pN1 vs pN0	2.451	1.408–4.265	0.002	2.168	1.183–3.972	0.012
	pN2vs pN0	5.071	2.774–9.271	0.000	3.980	1.983–7.988	0.000
	pN3 vs pN0	7.953	4.399–14.376	0.000	7.118	3.703–13.689	0.000
Ki-67	≤30% vs >30%	1.654	1.010–2.709	0.046	1.947	1.108–3.421	0.020

Abbreviations: CI, confidence interval; HR, hazard ratio.

The covariates in the Cox model were all categorical variables, and the adjusted p value and HR were derived from the model.