Table 4.

Cox Proportional Hazards Regression: Factors that Affected Overall Survival in Patients who Underwent Thyroid Lobectomy

Factor	HR	95% CI	p-value
Age (ref <45 years)
≥ 45 years	4.53	2.66–7.70	<0.001
Sex (ref=female)
Male	1.69	1.31–2.17	<0.001
Race (ref=white)
White/Hispanic	1.08	0.74–1.57	0.685
Black	1.62	1.14–2.32	0.007
Other	0.63	0.30–1.29	0.211
Insurance status (ref=private)
Uninsured	1.35	0.48–3.75	0.559
Medicaid	2.83	1.53–5.23	0.001
Medicare	5.98	4.55–7.86	<0.001
Military	1.80	0.43–7.41	0.416
Tumor Size, cm (ref <1cm)
≥1cm	1.49	1.12–1.99	0.006
Extrathyroidal extension (ref = no)
Yes	2.41	1.71–3.40	<0.001
Distant Metastases (ref = no)
Yes	10.38	5.23–20.53	<0.001
Radioiodine Utilization (ref=no)
Yes	0.53	0.38–0.72	<0.001

HR, hazard ratio; CI, confidence interval; ref, reference value

^**also included in the model urban/rural, facility type and location, histology