Table 5.

Multivariable Analyses of Covariables Associated with Overall Survival

Factors	HR	95% CI	P-value
Group
Targeted-radiotherapy vs Radiotherapy-targeted	0.690	0.344–1.384	0.296
Number of BM
1–3 vs > 3	2.038	1.045–3.976	0.037
Time from the first diagnosis to BM (m)
≥ 29 vs < 29	0.508	0.268–0.960	0.037
Treatment of Primary breast disease (Primary surgical treatment)
Yes vs No	1.847	0.925–3.688	0.082
Treatment after BM (Chemotherapy)
Yes vs No	0.646	0.216–1.931	0.434

Abbreviations: HR, hazard ratio; CI, confidence interval; OS, overall survival; BM, brain metastasis.