Table 1.

Patient baseline characteristics.

Variables	Value
Mean age (years, mean ± SD)	35.2 ± 11.6
Sex
Male	9 (27.3%)
Female	24 (72.7%)
Body mass index (mean ± SD)	24.5 ± 5.2
Tumor size (initial operation) (mean ± SD)	2.2 ± 1.8
Tumor location (initial operation)
Right	18 (54.5%)
Left	15 (45.5%)
Central LN dissection (initial operation)
No	7 (21.2%)
Yes	26 (78.8%)
Central LN dissection (completion operation)
No	22 (66.7%)
Yes	11 (33.3%)
Interval between the two operations (months, mean ± SD)	5.5 ± 2.6

SD: standard deviation.