Table 2.

Prognostic Groups for Treatment-Free Survival and Corresponding Disease-Specific Survival

		Treatment-Free Survival		Disease-Specific Survival
Group	Description	5-y (95% CI)	10-y (95% CI)	5-y (95% CI)	10-y (95% CI)
1	Localized stage, tumor ≤1 cm, no radioactive iodine	0.96 (0.95–0.97)	0.94 (0.93–0.95)	1.00 (0.99–1.00)	0.99 (0.99–1.00)
2	Localized stage, tumor ≤1 cm, + radioactive iodine	0.91 (0.90–0.092)	0.87 (0.86–0.89)	0.99 (0.98–0.99)	0.98 (0.97–0.98)
	or
	Localized stage, tumor >1 cm, female
3	Localized stage, tumor >1 cm, male	0.85 (0.83–0.87)	0.80 (0.78–0.83)	0.99 (0.98–1.00)	0.96 (0.95–0.98)
	or
	Regional stage, tumor ≤2 cm, lymph nodes not resected or resected and negative
4	Regional stage, tumor ≤2 cm, lymph nodes resected and positive	0.72 (0.70–0.75)	0.64 (0.60–0.67)	0.95 (0.94–0.96)	0.89 (0.86–0.91)
	or
	Regional stage, tumor >2 cm
5	Distant stage	0.52 (0.47–0.58)	0.39 (0.33–0.46)	0.76 (0.72–0.80)	0.59 (0.53–0.66)