Table 3.

Univariate and multivariate Cox models of OS

	Univariate analysis			Multivariate analysis
	HR	95% CI	P value	HR	95% CI	P value
Age	1.042	0.999–1.086	0.054	1.019	0.962–1.079	0.522
BMI	1.013	0.943–1.088	0.730
HR status	2.019	0.942–4.328	0.071	2.104	0.978–4.529	0.057
Menopausal status	2.133	1.081–4.210	0.029	1.768	0.670–4.665	0.250
cN status	3.921	1.624–9.471	0.002	4.060	1.672–9.859	0.002
cT status	1.680	0.857–3.295	0.131	1.1516	0.763–3.011	0.235
Zoledronic acid	0.448	0.218–0.919	0.029	0.468	0.226–0.967	0.040

Bold values indicate that P < 0.05OS overall survival, HR hazard ratio, CI confidence interval, BMI body mass index

the italicized data have a significance of > 0.05