Table 2.

Tumor Characteristics of Patients in SEER-Medicare

Characteristics	Mean per Year* n (%)	Range (Min – Max)
SEER-Medicare	1,045	707 – 1,279
Cancer Type
Papillary	899 (85.7)	596 – 1,146
Follicular	89 (8.7)	72 – 104
Hürthle Cell	57 (5.6)	39 – 79
SEER Stage
Localized	734 (69.9)	471 – 921
Regional	225 (21.4)	140 – 293
Distant	65 (6.6)	49 – 81
Unknown	20 (2.1)	12 – 36
Tumor Size
≤ 1 cm	378 (35.7)	223 – 530
>1 cm and ≤ 2 cm	238 (22.4)	137 – 314
> 2 cm and ≤ 4 cm	214 (20.6)	140 – 257
≥ 4 cm	145 (14.1)	110 – 171
Unknown	70 (7.2)	44 – 103

^*Mean per year is the aggregate of the means of all 12 years at the patient-level.