Table 3.

Cox Models of Prognostic Factors in Patients with Lung Metastasis

	HR	[95% CI]	p
Age at diagnosis of primary cancer ≥45 years	1.94	[0.77–4.88]	0.160
Primary tumor size ≥2 cm	2.05	[0.95–4.43]	0.069
Follicular pathology	1.49	[0.47–4.68]	0.500
Multiple site of metastasis	2.47	[0.81–7.55]	0.113
Late metastasis	1.76	[0.74–4.22]	0.204
Pattern of lung uptake in WBS
Bilateral diffuse	1	Reference
Focal	2.09	[0.51–8.56]	0.304
Nonavid	10.44	[2.59–42.05]	0.001

HR and 95% CI were based on Cox proportional hazard models for risk prediction. HR, hazard ratio; CI, confidential interval.