Table 1 Basic clinical characteristics of PTC patients with stage I aged < 55 years

Age (median)

39

Gender

 Female

146 (76.4%)

 Male

45 (23.6%)

Pathological T category

 T1

61 (31.9%)

 T2

64 (33.5%)

 T3

63 (33.0%)

 T4

2 (1.1%)

 TX

1 (0.5%)

Pathological N category

 N0

92 (48.2%)

 N1

92 (48.2%)

 NX

7 (3.6%)

Pathological M category

 M0

191 (100%)

ATA recurrence risk stratification *

 Low

61 (31.9%)

 Intermediate

92 (48.1%)

 High

2 (1%)

Recurrence

 Yes

11 (5.8%)

 No

180 (94.2%)