Table 2.

Univariate and multivariate analysis for local failure

Covariate	HR (95% CI)	P-value
Univariate
Surgical resection	1.44 (0.44–4.75)	0.55
Tumor size ≤2 cm	0.36 (0.17–0.75)	0.01
Concurrent systemic therapy	1.37 (0.64–2.97)	0.42
Location of metastasis	1.10 (0.47–2.54)	0.83
Histology
Renal cell	0.40 (0.04–3.55)	0.41
Melanoma	0.34 (0.04–3.09)	0.22
Squamous cell	1.67 (0.37–7.48)	0.50
Adenocarcinoma	1.23 (0.42–3.56)	0.71
Recent Immunotherapy	0.18 (0.04–0.75)	0.02
Prior WBRT	1.88 (0.94–3.76)	0.08
Multivariate
Recent immunotherapy	0.26 (0.06–1.17)	0.08
Prior WBRT	1.66 (0.75–3.67)	0.21
Tumor size ≤2 cm	0.38 (0.17–0.84)	0.02