Table 1 Clinical characteristics and variables of patients

Age

 ＜55

15

14

0.723

 ≥55

5

6

Gender

 male

6

4

0.465

 female

14

16

BMI

 ＜24

12

10

0.525

 ≥24

8

10

Lymph nodes dissected in IV region

 1~5

6

4

0.726

 6~10

12

13

 ＞10

2

3

Histologic

 papillary carcinoma

18

17

0.5

 medullary carcinoma

2

3

Side of dissection

 left

13

17

0.273

 right

7

3

LL/CL

 Positive

0

5

0.024

 Negative

20

15

Operation time (mins)

118.5±15.5

113.3±12.4

0.249

Extubation time (days)

6.2±2.3

8.8±2.7

0.002

Hospital stay (days)

4.2±1.3

5.8±2.2

0.008

Patients’ self-satisfaction score

1.2±0.3

1.8±0.8

0.017